Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 07, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	LCNB CORP.
Entity Central Index Key	0001074902
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		13,308,749