EXHIBIT 24 - POWER OF ATTORNEY

KNOW ALL MEN BY THESE
PRESENTS, that each of the undersigned, being a director or officer of State
Bancorp, Inc., a New York corporation (the Company), hereby constitutes and
appoints Brian K. Finneran, Theresa DiVittorio and Mary Ann DiLorenzo, and each
of them, his or her true and lawful attorney-in-fact and agent, with full power
of substitution and resubstitution, for him or her and in his or her name,
place and stead in any and all capacities, to sign one or more Annual Reports
for the Companys fiscal year ended December 31, 2008, on Form 10-K under the
Securities Exchange Act of 1934, as amended, or such other form as any such
attorney-in-fact may deem necessary or desirable, any amendments thereto, and
all additional amendments thereto, each in such form as they or any one of them
may approve, and to file the same with all exhibits thereto and other documents
in connection therewith with the Securities and Exchange Commission, granting
unto said attorneys-in-fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary
to be done so that such Annual Report shall comply with the Securities Exchange
Act of 1934, as amended, and the applicable Rules and Regulations adopted or
issued pursuant thereto, as fully and to all intents and purposes as he or she
might or could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or any of them or their substitute or
resubstitute, may lawfully do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, each of
the undersigned has hereunto set his or her hand this 16 day of March, 2009.

|               |  |                        
|-------------- |  | -----------------------
|Date:
 3/16/09 |  | /s/ Thomas E. Christman
|               |  |                        
|               |  | Thomas
 E. Christman   
|               |  |                        
|Date:
 3/16/09 |  | /s/
 Arthur Dulik, Jr. 
|               |  |                        
|               |  | Arthur
 Dulik, Jr.     
|               |  |                        
|Date:
 3/16/09 |  | /s/ Nicos Katsoulis    
|               |  |                        
|               |  | Nicos Katsoulis        
|               |  |                        
|Date:
 3/16/09 |  | /s/ John J. LaFalce    
|               |  |                        
|               |  | John J. LaFalce        
|               |  |                        
|Date:
 3/16/09 |  | /s/ K. Thomas Liaw     
|               |  |                        
|               |  | K.
 Thomas Liaw        
|               |  |                        
|Date:
 3/16/09 |  | /s/ Thomas M. OBrien  
|               |  |                        
|               |  | Thomas M. OBrien      
|               |  |                        
|Date:
 3/16/09 |  | /s/ John F. Picciano   
|               |  |                        
|               |  | John
 F. Picciano      
|               |  |                        
|Date:
 3/16/09 |  | /s/ Suzanne H. Rueck   
|               |  |                        
|               |  | Suzanne
 H. Rueck      
|               |  |                        
|Date:
 3/16/09 |  | /s/ Andrew J. Simons   
|               |  |                        
|               |  | Andrew
 J. Simons      
|               |  |                        
|Date:
 3/16/09 |  | /s/ Jeffrey S. Wilks   
|               |  |                        
|               |  | Jeffrey
 S. Wilks      

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