Guslitsa, Guslica, or Guslicy (Russian: Гу́слица, Гу́слицы) is a region situated in the eastern part of Moscow Oblast.
Guslitsa is famous for it was almost entirely inhabited by the Old Believers, mainly popovtsy (Belokrinitskaya Hierarchy, now — Russian Orthodox Old-Rite Church).
Guslitsa is also well known for its cultural heritage and its home-crafts, mainly hand-written singing books and copper mouldings.
Guslitsa has its center in the Rudnya and Ilyinsky Pogost villages.
Nowadays Guslitsa lies almost entirely within Orekhovo-Zuyevsky District of Moscow Oblast.