| Cox's Bazar-4 | |
| Parl Name: | Jatiya Sangsad |
| District: | Cox's Bazar District |
| Region Label: | Division |
| Region: | Chittagong Division |
| Electorate: | 266,146 (2018) |
| Year: | 1984 |
| Party Label: | Parliamentary Party |
| Members Label: | Member of Parliament |
| Local Council Label: | Council area |
Cox's Bazar-4 is a constituency represented in the Jatiya Sangsad (National Parliament) of Bangladesh. Since 6 August 2024 the constituency is Vacant.
The constituency encompasses Teknaf and Ukhia upazilas.
The constituency was created in 1984 from the Chittagong-18 constituency when the former Chittagong District was split into two districts: Chittagong and Cox's Bazar.