Altentreptow (German pronunciation: [altənˈtʁeːpto] ⓘ) is a town in the Mecklenburgische Seenplatte district, in Mecklenburg-Western Pomerania, Germany.

It is situated on the river Tollense in Western Pomerania, 15 km north of Neubrandenburg.

The name Treptow is mentioned for the first time in 1175, in reference to the establishment of a monastery on the site, which however later moved to Verchen.

The present town was most probably founded in the early 13th century, and is referred to as a "civitas", i.e. Latin for "city", in 1245.

Of the latter, only the ground floor remains, with additions and alterations made in the 19th century.