A police station: the local office that handles police work such as reports, investigations, and administration (larger than a koban).
事故の届出は最寄りの警察署で行ってください。
Please file an accident report at the nearest police station.
彼は警察署に出頭した。
He turned himself in at the police station.
警察署の前に長い列ができていた。
A long line had formed in front of the police station.