Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2023	Aug. 11, 2023
Document Information [Line Items]
Entity Central Index Key	0000818677
Entity Registrant Name	SECURITY FEDERAL CORP
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2023
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	000-16120
Entity Incorporation, State or Country Code	SC
Entity Tax Identification Number	57-0858504
Entity Address, Address Line One	238 Richland Avenue Northwest
Entity Address, City or Town	Aiken
Entity Address, State or Province	SC
Entity Address, Postal Zip Code	29801
City Area Code	803
Local Phone Number	641-3000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	true
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		3,253,210