EXHIBIT 24

POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Marcia S. Albright
| | ----------- | ----------------------
| |             |                       
| | Print Name: | Marcia S. Albright    
| |             |                       
| | Title:      | Director              
| |             |                       
| | Date:       | 2/18/08               

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Dean Calhoun
| | ----------- | ----------------
| |             |                 
| | Print Name: | Dean Calhoun    
| |             |                 
| | Title:      | Director        
| |             |                 
| | Date:       | 3/18/08         

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ John S. Carton
| | ----------- | ------------------
| |             |                   
| | Print Name: | John S. Carton    
| |             |                   
| | Title:      | Director          
| |             |                   
| | Date:       | 2-17-08           

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ H. Kenneth Cole
| | ----------- | -------------------
| |             |                    
| | Print Name: | H. Kenneth Cole    
| |             |                    
| | Title:      | Director           
| |             |                    
| | Date:       | Feb. 19, 2008      

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Richard E. Dyer                  
| | ----------- | -------------------------------------
| |             |                                      
| | Print Name: | Richard E. Dyer                      
| |             |                                      
| | Title:      | Executive Vice President and Director
| |             |                                      
| | Date:       | 2-26-08                              

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Robert L. Hance
| | ----------- | -------------------
| |             |                    
| | Print Name: | Robert L. Hance    
| |             |                    
| | Title:      | Director           
| |             |                    
| | Date:       | Feb 19, 2008       

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Gary Hart Haberl
| | ----------- | --------------------
| |             |                     
| | Print Name: | Gary Hart Haberl    
| |             |                     
| | Title:      | Director            
| |             |                     
| | Date:       | 2/19/08             

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Nolan E. Hooker
| | ----------- | -------------------
| |             |                    
| | Print Name: | Nolan E. Hooker    
| |             |                    
| | Title:      | Director           
| |             |                    
| | Date:       | 2-19-08            

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Gregory J. Hull
| | ----------- | -------------------
| |             |                    
| | Print Name: | Gregory J. Hull    
| |             |                    
| | Title:      | Director           
| |             |                    
| | Date:       | 2/19/08            

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Thomas E. Kolassa
| | ----------- | ---------------------
| |             |                      
| | Print Name: | Thomas E. Kolassa    
| |             |                      
| | Title:      | Director             
| |             |                      
| | Date:       | 3-18-08              

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Donald J. Labrecque
| | ----------- | -----------------------
| |             |                        
| | Print Name: | Donald J. Labrecque    
| |             |                        
| | Title:      | Director               
| |             |                        
| | Date:       | 2/17/08                

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Brian P. McConnell
| | ----------- | ----------------------
| |             |                       
| | Print Name: | Brian P. McConnell    
| |             |                       
| | Title:      | Director              
| |             |                       
| | Date:       | March 11, 2008        

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle, Kurt G. Miller, and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Freeman E. Riddle
| | ----------- | ---------------------
| |             |                      
| | Print Name: | Freeman E. Riddle    
| |             |                      
| | Title:      | Director             
| |             |                      
| | Date:       | February 26, 2008    

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint Kurt G. Miller and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ John H. Castle                            
| | ----------- | ----------------------------------------------
| |             |                                               
| | Print Name: | John H. Castle                                
| |             |                                               
| | Title:      | Chairman, Chief Executive Officer and Director
| |             |                                               
| | Date:       | 2/29/08                                       

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle and Danice L. Chartrand, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Kurt G. Miller    
| | ----------- | ----------------------
| |             |                       
| | Print Name: | Kurt G. Miller        
| |             |                       
| | Title:      | President and Director
| |             |                       
| | Date:       | February 29, 2008     

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POWER OF ATTORNEY

The undersigned, in his or her capacity as a director or officer of Southern Michigan Bancorp, Inc., does hereby appoint John H. Castle and Kurt G. Miller, and each of them, his or her attorneys or attorney, with full power of substitution and resubstitution, for such individual and in his or her name, place and stead, in any and all capacities, to sign the Form 10-K of Southern Michigan Bancorp, Inc. for its fiscal year ended December 31, 2007, and any and all amendments thereto, and to file the same, with all exhibits and related documents, with the Securities and Exchange Commission.

| | Signature:  | /s/ Danice L. Chartrand                          
| | ----------- | -------------------------------------------------
| |             |                                                  
| | Print Name: | Danice L. Chartrand                              
| |             |                                                  
| | Title:      | Senior Vice President and Chief Financial Officer
| |             |                                                  
| | Date:       | 2-18-08