Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2024	Mar. 12, 2025	Jun. 30, 2024
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	FY
Document Fiscal Year Focus	2024
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Document Transition Report	false
Entity File Number	000-26121
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 Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 185,462,962
Entity Common Stock, Shares Outstanding		14,157,962
Auditor Name	Plante & Moran PLLC
Auditor Location	Auburn Hills, Michigan
Auditor Firm ID	166