Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 15, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Entity File Number	0-13232
Document Period End Date	Dec. 31, 2020
Entity Registrant Name	JUNIATA VALLEY FINANCIAL CORP
Entity Central Index Key	0000714712
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-2235254
Entity Address, Address Line One	Bridge and Main Streets
Entity Address, Address Line Two	PO Box 66
Entity Address, City or Town	Mifflintown
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	17059-0066
City Area Code	855
Local Phone Number	582-5101
Title of 12(b) Security	NONE
No Trading Symbol Flag	true
Security Exchange Name	NONE
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
Entity Shell Company	false
Amendment Flag	false
Entity Public Float			$ 81,175,394
Entity Common Stock, Shares Outstanding		5,151,279