The Grigorovich M-11 (or Shchetinin M-11) was a Russian single-seat fighter flying boat designed by Dmitry Pavlovich Grigorovich and built by Shchetinin Originally conceived as a two-seater the prototype M-11 was built in 1916 at the Shchetinin factory in Petrograd.

The M-11 was a biplane with a 100 hp (75 kW) Gnome Monosoupape rotary engine with a pusher propeller strut mounted below the upper wing.

The small number of two-seaters had a poor performance and were only used as trainers, Grigorovich developed a single-seat version powered by a 110 hp (82 kW) Le Rhône engine and fitted with a forward firing machine gun in front of the cockpit.

Originally 100 single-seat M-11s had been ordered but this was reduced to 60 as the aircraft had poor handling when landing or alighting on water.

Although the climb to height was improved the forward speed was 5 mph (8 km/h) less than the M-11 consequentially only a few M-12s were built.