Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2025	May 07, 2025
Document Information [Line Items]
Entity Central Index Key	0001074902
Entity Registrant Name	LCNB CORP
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2025
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2025
Document Transition Report	false
Entity File Number	001-35292
Entity Incorporation, State or Country Code	OH
Entity Tax Identification Number	31-1626393
Entity Address, Address Line One	2 North Broadway
Entity Address, City or Town	Lebanon
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45036
City Area Code	513
Local Phone Number	932-1414
Title of 12(b) Security	Common Stock, No Par Value
Trading Symbol	LCNB
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		14,167,428