Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 03, 2020
Document and Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-39090
Entity Registrant Name	Provident Bancorp, Inc
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	84-4132422
Entity Address, Address Line One	5 Market Street
Entity Address, City or Town	Amesbury
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01913
City Area Code	978
Local Phone Number	834-8555
Title of 12(b) Security	Common stock
Trading Symbol	PVBC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		19,425,141
Entity Central Index Key	0001778784
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020