Document and Entity Information (USD $)	3 Months Ended
	Sep. 30, 2011
Document and Entity Information
Entity Registrant Name	Security Federal Corporation
Document Type	10-Q
Document Period End Date	Sep. 30, 2011
Amendment Flag	false
Entity Central Index Key	0000818677
Current Fiscal Year End Date	--03-31
Entity Common Stock, Shares Outstanding	2,944,001
Entity Public Float	$ 27,997,450
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2