Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 09, 2020
Cover [Abstract]
Entity Registrant Name	OHIO VALLEY BANC CORP
Entity Central Index Key	0000894671
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		4,787,446
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	0-20914
Entity Tax Identification Number	31-1359191
Entity Incorporation, State or Country Code	OH
Entity Address, Address Line One	420 Third Avenue
Entity Address, City or Town	Gallipolis
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	45631
City Area Code	740
Local Phone Number	446-2631
Title of 12(b) Security	Common shares, without par value
Trading Symbol	OVBC
Security Exchange Name	NASDAQ