Exhibit II

to

Schedule 13G

Joint Filing Agreement

The undersigned persons agree and consent to the joint filing on their behalf of this Schedule 13G dated July 8, 2011 in connection with their beneficial ownership of First Niagara Financial Group, Inc. Each of Columbia Marsico 21st Century Fund and Columbia Management Investment Advisers, LLC authorizes Ameriprise Financial, Inc. to execute the Schedule 13G to which this Exhibit is attached and make any necessary amendments thereto.

Ameriprise Financial, Inc.
By:	/s/ Wade M. Voigt Wade M. Voigt
	Director — Fund Administration
Columbia Management Investment Advisers, LLC
By:	/s/ Amy Johnson Amy Johnson
	Chief Operating Officer
Columbia Funds Series Trust,
on behalf of its series Columbia Marsico 21st Century Fund
By:	/s/ Scott R. Plummer Scott R. Plummer
	General Counsel