Mirsk  (Friedeberg) is a town in Lwówek Śląski County, Lower Silesian Voivodeship, in south-western Poland. It is the seat of the administrative district (gmina) called Gmina Mirsk, close to the Czech border. Prior to 1945 it was in Germany.
It lies approximately south-west of Lwówek Śląski, and west of the regional capital Wrocław.
As at 2006, the town has a population of 4,136.
names, 1201-1945: Eulendorf
, Friedeberg am Queis
and Friedeberg im Isergebirge
; for a short period after World War 2
: Spokojna Góra (meaning "peaceful mountain").