The Southold Town Police Department (STPD), commonly referred to as Southold Police, is the primary law enforcement agency within the town of Southold, New York. The Southold Police Department also operates an emergency service dispatch center, servicing two police departments and eight local fire departments.

The Town of Southold is one of ten towns in Suffolk County, New York, United States. It is located in the northeastern tip of the county, on the North Fork of Long Island. The population was 23,732 at the 2020 census. The town also contains a hamlet named Southold, which was settled in 1640.