Entity Information (USD $)	3 Months Ended
	Mar. 31, 2012	Jun. 30, 2011
Entity Registrant Name	PATHFINDER BANCORP INC
Entity Central Index Key	0001046188
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float		$ 8,000,000
Entity Common Stock, Shares Outstanding	2,617,682
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1