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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2023
Mar. 06, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-39232    
Entity Registrant Name RUSH STREET INTERACTIVE, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 84-3626708    
Entity Address, Address Line One 900 N. Michigan Avenue    
Entity Address, Address Line Two Suite 950    
Entity Address, City or Town Chicago    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60611    
City Area Code 773    
Local Phone Number 893-5855    
Title of 12(b) Security Class A common stock, $0.0001 par value per share    
Trading Symbol RSI    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 202,346,598
Document Information [Line Items]      
Documents Incorporated by Reference
Portions of our Definitive Proxy Statement for our 2024 Annual Meeting of Stockholders, to be filed within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K, are incorporated by reference into Part III of this Form 10-K. Except with respect to information specifically incorporated by reference in this Annual Report, the Proxy Statement shall not be deemed to be filed as part hereof.
    
Entity Central Index Key 0001793659    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2023    
Amendment Flag false    
Class A Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding (in shares)   76,537,867  
Class V Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding (in shares)   146,434,310