Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Aug. 01, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	001-38779
Entity Registrant Name	Rhinebeck Bancorp, Inc.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	83-2117268
Entity Address, Address Line One	2 Jefferson Plaza
Entity Address, City or Town	Poughkeepsie
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	12601
City Area Code	845
Local Phone Number	454-8555
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	RBKB
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		11,296,103
Entity Central Index Key	0001751783
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false