Grigorij Mesežnikov (born 25 March 1958, Oryol, USSR) is a political analyst of Jewish descent who lives in Bratislava, Slovakia.
Born in the Soviet Union, in 1979 Mesežnikov moved to Slovakia with his wife.
With Martin Bútora (presidential candidate in the 2004 election), he founded the Slovak Institute for Public Affairs (IVO).
IVO's aim is spreading principles of democracy in Slovakia.
Mesežnikov is a frequent contributor to many politics-related newspapers in Slovakia.