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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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