Document and Entity Information	9 Months Ended
	Sep. 30, 2019 shares
Document And Entity Information
Entity Registrant Name	SOUTHWEST GEORGIA FINANCIAL CORP
Entity Central Index Key	0000315849
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business Flag	true
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	0
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019