Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2024	Aug. 08, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Trading Symbol	RAPP
Entity Registrant Name	Rapport Therapeutics, Inc.
Entity Central Index Key	0002012593
Entity Current Reporting Status	No
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Title of 12(b) Security	Common Stock, $0.001 par value per share
Security Exchange Name	NASDAQ
Entity File Number	001-42121
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	88-0724208
Entity Address, Address Line One	1325 Boylston Street
Entity Address, Address Line Two	Suite 401
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02215
City Area Code	857
Local Phone Number	321-8020
Document Quarterly Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		36,576,457