Le poste de quartier is a police station. Literally, it means “neighbourhood station.”
In this image taken along rue Sainte-Catherine in Montréal, we see a sign telling us that this is poste de quartier 20.
If you’re a fan of the television police series 19-2, the 19 in the name of the show is the poste de quartier number.
To talk about the police officers in station 20, you could say les policiers du poste de quartier 20, or simply les policiers du poste 20.
The police force of Montréal is called le SPVM, which stands for le Service de police de la Ville de Montréal.