Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 01, 2015
Document And Entity Information Abstract
Entity Registrant Name	Jacksonville Bancorp, Inc.
Entity Central Index Key	0001484949
Trading Symbol	jxsb
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock Shares Outstanding		1,790,123
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3