Löwenströmska lasarettet is a locality situated in Upplands Väsby Municipality, Stockholm County, Sweden.

It takes its name from a hospital that was founded by the brother of Jacob Johan Anckarström, the murderer of king Gustav III of Sweden.

His brother, Gustaf Adolf Anckarström, changed his surname to Löwenström and founded the hospital as an act of penance.

A number of other buildings were added over the years, including a sanatorium and a psychiatric hospital.

This article about a location in Stockholm County, Sweden is a stub.