Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Apr. 30, 2021	Jun. 30, 2020
Document and Entity Information:
Entity Registrant Name	UNITED BANCSHARES INC /PA
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Entity Central Index Key	0000944792
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		826,921
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Entity Public Float			$ 0
Entity Interactive Data Current	No
Entity, File Number	0-25976
Entity Incorporation, State or Country Code	PA
Entity Address, Address Line One	The Graham Building
Entity Address, Address Line Two	30 South 15th Street
Entity Address, Address Line Three	Suite 1200
Entity Address, City or Town	Philadelphia
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19102
City Area Code	215
Local Phone Number	351-4600