| Cover Page Cover Page | Dec. 16, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 16, 2020 |
| Entity File Number | 001-36558 |
| Entity Registrant Name | Townsquare Media, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 27-1996555 |
| Entity Address, Address Line One | One Manhattanville Road |
| Entity Address, Address Line Two | Suite 202 |
| Entity Address, City or Town | Purchase, |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10577 |
| City Area Code | 203 |
| Local Phone Number | 861-0900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, $0.01 par value per share |
| Trading Symbol | TSQ |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001499832 |
| Amendment Flag | false |
