UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q

(Mark One)

Commission File Number:  000-49772

(517) 279-5500
(Registrant's Telephone Number, Including Area Code)

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes       X      No       

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act (Check one):

Large accelerated filer             Accelerated filer             Non-accelerated filer          Smaller reporting company   X  

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).           Yes             No    X   

The number of shares outstanding of the Registrant's Common Stock, $2.50 par value, as of November 11, 2008, was 2,311,792 shares.

Forward-Looking Statements

          This report contains forward-looking statements that are based on management's beliefs, assumptions, current expectations, estimates and projections about the financial services industry, the economy, and Southern Michigan Bancorp, Inc. Forward-looking statements are identifiable by words or phrases such as "outlook", or "strategy"; that an event or trend "may", "should", "will", or "is likely" to occur or "continue" or "is scheduled" or "on track" or that Southern Michigan Bancorp, Inc. or its management "anticipates", "believes", "estimates", "plans", "forecasts", "intends", "predicts", "projects", or "expects" a particular result, or is "confident," "optimistic" or has an "opinion" that an event will occur, and variations of such words and similar expressions. All of the information concerning interest rate sensitivity is forward-looking. The future effect of changes in the real estate markets and the Michigan and national economy on the banking industry, generally, and Southern Michigan Bancorp, Inc., specifically, are also inherently uncertain. Management's determination of the provision and allowance for loan losses involves judgments that are inherently forward-looking. These statements are not guarantees of future performance and involve certain risks, uncertainties and assumptions ("risk factors") that are difficult to predict with regard to timing, extent, likelihood and degree of occurrence. Therefore, actual results and outcomes may materially differ from what may be expressed or forecasted in such forward-looking statements. Southern Michigan Bancorp, Inc. undertakes no obligation to update, amend or clarify forward-looking statements, whether as a result of new information, future events or otherwise.

          Risk factors include, but are not limited to, the risk factors described in "Item 1A - Risk Factors" of Southern Michigan Bancorp, Inc.'s Annual Report on Form 10-K for the year ended December 31, 2007; the timing and level of asset growth; changes in banking laws and regulations; changes in tax laws; changes in prices, levies and assessments; the impact of technological advances and issues; governmental and regulatory policy changes; opportunities for acquisitions and the effective completion of acquisitions and integration of acquired entities; the possibility that anticipated cost savings and revenue enhancements from acquisitions, restructurings, reorganizations and bank consolidations may not be realized at amounts projected, at all or within expected time frames; the local and global effects of the ongoing war on terrorism and other military actions, including actions in Iraq; and current uncertainties and fluctuations in the financial and credit markets and stocks of financial services providers due to concerns about credit availability and concerns about the Michigan economy in particular. These and other factors are representative of the risk factors that may emerge and could cause a difference between an ultimate actual outcome and a preceding forward-looking statement.

Part I.  Financial Information

SOUTHERN MICHIGAN BANCORP, INC.
UNAUDITED INTERIM FINANCIAL STATEMENTS

CONSOLIDATED BALANCE SHEETS (UNAUDITED)
(In thousands, except share data)

See accompanying notes to interim consolidated financial statements.

SOUTHERN MICHIGAN BANCORP, INC.
CONSOLIDATED STATEMENTS OF INCOME (Unaudited)
(In thousands, except per share data)

See accompanying notes to interim consolidated financial statements.

SOUTHERN MICHIGAN BANCORP, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED)
(In thousands, except number of shares and per share data)
For the Nine Months Ending September 30, 2008 and 2007

See accompanying notes to interim consolidated financial statements.

SOUTHERN MICHIGAN BANCORP, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
(Dollars in thousands)

See accompanying notes to interim consolidated financial statements.

SOUTHERN MICHIGAN BANCORP, INC.
NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE A - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation: The consolidated financial statements include the accounts of Southern Michigan Bancorp, Inc. and its wholly-owned subsidiaries, Southern Michigan Bank & Trust (SMB&T) and FNB Financial (FNB) after elimination of significant inter-company balances and transactions. SMB&T owns SMB Mortgage Company, which transacts all residential real estate loans. It is consolidated into SMB&T's financial statements. FNB owns FNB Financial Services, which conducts a brokerage business and is consolidated into FNB's financial statements. During 2004, the Company formed a special purpose trust, Southern Michigan Bancorp Capital Trust I for the sole purpose of issuing trust preferred securities. Under generally accepted accounting principles, the trust is not consolidated into the financial statements of the Company.

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions for Form 10-Q and Rule 8-03 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of management, all adjustments considered necessary in order to make the financial statements not misleading have been included. Operating results for the three months and nine month periods ending September 30, 2008 are not necessarily indicative of the results that may be expected for the year ending December 31, 2008.

The accompanying consolidated financial statements should be read in conjunction with the consolidated financial statements and footnotes of the Company for December 31, 2007 included in the Company's Annual Report on Form 10-K for the year ended December 31, 2007, filed with the Securities and Exchange Commission on March 28, 2008. As discussed in the Company's Annual Report on Form 10-K for the year ended December 31, 2007, the Company acquired FNB on December 1, 2007. The transaction was accounted for using the purchase method of accounting and therefore the operating results for the three and nine month periods ending September 30, 2007 do not include FNB.

Reclassifications
Some items in the prior period consolidated financial statements have been reclassified to conform to the current year presentation.

NOTE B - NEW ACCOUNTING PRONOUNCEMENTS

On February 15, 2007, the Financial Accounting Standards Board (FASB) issued Statement of Financial Accounting Standards No. 159, "The Fair Value Option for Financial Assets and Financial Liabilities" (FAS 159). FAS 159 permits, but does not require, entities to measure selected financial assets and liabilities at fair value. Changes in fair value are recorded through the income statement in subsequent periods. The statement provides for a one time opportunity to transfer existing assets and liabilities to fair value at the point of adoption with a cumulative effect adjustment recorded against equity. After adoption, the election to report assets and liabilities at fair value must be made at the point of their inception. There was no impact on the consolidated financial statements of the Company as a result of the adoption of Statement 159 since the Company has not elected the fair value option for any eligible items, as defined in FAS 159.

In September 2006, the FASB issued Statement No. 157, "Fair Value Measurements" (FAS 157) which defines fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. FAS 157 also establishes a fair value hierarchy which requires the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:

On February 12, 2008, the FASB issued Staff Position 157-2 which defers the effective date of Statement 157 for certain non-financial assets and liabilities to fiscal years beginning after November 15, 2008. All other provisions of Statement 157 are effective for fiscal years beginning after November 15, 2007 and interim periods within those fiscal years.

The Company adopted the provisions of FAS 157 for the quarter ended March 31, 2008 except for those non-financial assets and liabilities subject to deferral as a result of Staff Position 157-2. There was no impact on the consolidated financial statements of the Company as a result of the adoption of FAS 157.

Following is a description of the valuation methodologies used for instruments measured at fair value on a recurring basis and recognized in the accompanying consolidated balance sheet, as well as the general classification of such instruments pursuant to the valuation hierarchy.

Following is a description of the valuation methodologies used for instruments measured at fair value on a non-recurring basis and recognized in the accompanying consolidated balance sheet, as well as the general classification of such instruments pursuant to the valuation hierarchy.

The FASB Emerging Issues Task Force finalized in 2007 Issues No. 06-4 and 06-10 dealing with the accounting for deferred compensation and post-retirement benefit aspects of endorsement and collateral assignment split-dollar life insurance arrangements. These Issues require that a liability be recorded during the service period when a split-dollar life insurance agreement continues after participants' employment or retirement. The required accrued liability will be based on either the post-employment benefit cost for the continuing life insurance or based on the future death benefit depending on the contractual terms of the underlying agreement. The Issues are effective for fiscal years beginning after December 15, 2007. The adoption of the Issues effective January 1, 2008 did not have a material impact on the Company's consolidated financial statements.

On November 5, 2007, the SEC issued Staff Accounting Bulletin No. 109, Written Loan Commitments Recorded at Fair Value through Earnings ("SAB 109"). Previously, SAB 105, Application of Accounting Principles to Loan Commitments, stated that in measuring the fair value of a derivative loan commitment, a company should not incorporate the expected net future cash flows related to the associated servicing of the loan. SAB 109 supersedes SAB 105 and indicates that the expected net future cash flows related to the associated servicing of the loan should be included in measuring fair value for all written loan commitments that are accounted for at fair value through earnings. SAB 105 also indicated that internally-developed intangible assets should not be recorded as part of the fair value of a derivative loan commitment, and SAB 109 retains that view. SAB 109 is effective for derivative loan commitments issued or modified in fiscal quarters beginning after December 15, 2007. The adoption of this standard effective January 1, 2008 did not have a material impact on the Company's consolidated financial statements.

In December, 2007, FASB issued Statement No. 160, "Noncontrolling Interest in Consolidated Financial Statements" and revised Statement No. 141R, "Business Combinations." Both are effective for annual periods beginning after December 15, 2008. The Company is currently evaluating the impact of these Statements, but does not believe that either will have a material impact on its financial statements.

In March 2008, FASB issued Statement No. 161, "Disclosures about Derivative Instruments and Hedging Activities" (FAS 161). FAS 161 is an amendment of FABS 133, "Accounting for Derivative Instruments and Hedging Activities", and is intended to improve financial reporting transparency regarding derivative instruments and hedging activities. FAS 161 is effective for financial statements issued for fiscal years and interim periods beginning after November 15, 2008, with early adoption encouraged. The Company is currently evaluating the impact of FAS 161 on the Company's consolidated financial statements, but does not believe it will have a material impact on the consolidated financial statements.

NOTE C - EARNINGS PER SHARE

Basic earnings per common share is net income divided by the weighted average number of common shares outstanding during the period. ESOP shares are considered outstanding for this calculation unless unearned. Diluted earnings per common share includes the dilutive effect of additional potential common shares issuable under stock options. Earnings and dividends per common share are restated for all stock splits and dividends through the date of issue of the financial statements.

A reconciliation of the numerators and denominators of basic and diluted earnings per share for the three and nine month periods ended September 30, 2008 and 2007 is as follows (dollars in thousands, except per share data):

Stock option awards outstanding that were anti-dilutive and therefore not included in the computation of earnings per share were as follows: 215,818 and 130,425 for the three months ended September 30, 2008 and 2007, respectively, and 193,675 and 130,425 for the nine months ended September 30, 2008 and 2007, respectively. Shares outstanding in 2008 included the issuance of 535,936 shares in connection with the purchase of FNB.

NOTE D - STOCK OPTIONS

Shareholders of the Company approved a stock option plan in April 2000 and a stock incentive plan in June 2005. The plans were authorized to issue up to 115,500 and 157,500 shares, respectively. In May 2008, shareholders of the Company ratified amendments to the Stock Incentive Plan of 2005, which among other things increased the authorized shares from 157,500 to 300,000. As of September 30, 2008, there were 44,841 shares available for future issuance under the 2000 plan and 140,057 shares available for future issuance under the 2005 plan.

A summary of stock option activity in the plans is as follows for the nine months ended September 30, 2008:

In January 2007, 2,740 shares of restricted stock were issued to employees and directors. The shares vest 20% per year over five years. In June 2008, 5,535 shares of restricted stock were issued to employees and directors. The shares also vest 20% per year over five years. Compensation expense of $17,000 and $9,000 was recorded during the nine months ended September 30, 2008 and 2007, respectively.

For the nine months ended September 30, 2008 and 2007, compensation expense of $84,000 and $57,000, respectively, was recorded with respect to options granted in 2007 and 2008. Such expense was computed in accordance with Statement of Financial Accounting Standards No. 123R, "Share-Based Payment."

          The following discussion provides information about the financial condition and results of operations of the Company and its subsidiary banks, Southern Michigan Bank & Trust (SMB&T) and FNB Financial (FNB), for the three and nine month periods ending September 30, 2008 and 2007. Financial results for 2008 were influenced by the acquisition of FNB on December 1, 2007. In accordance with the purchase method of accounting, FNB's results of operations were included in the Company's consolidated statements of income from the date of acquisition. Consequently, comparisons of year to date and quarterly results for the period ended September 30, 2008 to year to date and quarterly results for the period ended September 30, 2007 are affected by the inclusion of FNB's results. The purchase of FNB resulted in an increase in assets of $150,406,000 and an increase in shareholders' equity of $12,711,000.

          Results of Operations

          For the first nine months of 2008, net income was $1,571,000 and basic and diluted earnings per share were $0.69, compared with net income of $3,129,000 and basic and diluted earnings per share of $1.77 and $1.76, respectively, for the first nine months of 2007. Included in the 2008 results was a $390,000 tax free gain on life insurance proceeds. Negatively impacting income before income taxes for the nine month period of 2008 was a $2,385,000 increase in the provision for loan losses. Over half of the 2008 increase in the provision for loan losses relates to a single large commercial credit in the automotive industry.

          Net income for the third quarter of 2008 was $21,000 compared to $1,082,000 for the same period of 2007. Basic and diluted earnings per share decreased from $0.61 for the third quarter of 2007 to $0.01 for the same period of 2008. The Company's provision for loan losses for the third quarter of 2008 was $1,580,000 compared to $145,000 in the third quarter of 2007, a $1,435,000 increase.

          Return on average assets was .44% for the first nine months of 2008 compared to 1.24% for the first nine months of 2007. Return on average shareholders' equity was 4.56% for the first nine months of 2008, compared to 13.97% for the same period in 2007. Such rates were computed on an annualized basis.

          Net Interest Income

          The Company derives the greatest portion of its income from net interest income. During 2007, short-term rates were unchanged for the first eight months of the year. Beginning in September of 2007, the Federal Open Market Committee began lowering short-term rates. Through the third quarter of 2008, short-term rates dropped 225 basis points. The Company has been able to lower its cost of funds by 95 basis points compared to September 30, 2007, but tax equivalent yields on average assets declined to 6.44% from 7.61% for the same periods, a decline of 117 basis points. This resulted in a decline in the interest rate spread and net interest margin.

          The following tables provide information regarding interest income and expense for the nine-month periods ended September 30, 2008 and 2007. Table 1 shows the year-to-date daily average balances for interest earning assets and interest bearing liabilities, interest earned or paid, and the annualized effective rate, for the nine-month periods ended September 30, 2008 and 2007. Table 2 shows the effect on interest income and expense of changes in volume and interest rates. Both tables are on a tax equivalent basis.

Table 1 - Average Balances and Tax Equivalent Interest Rates