Smilga may refer to:
Smilga (river), Lithuania
Surname Ivan Smilga (Jānis Smilga) (1898-1918), Soviet Latvian soldier buried in the Kremlin Wall Necropolis Ivar Smilga (1892–1938), Soviet Bolshevik leader Kārlis Smilga (born 1975), Latvian curler Vineta Smilga, Latvian curler, see 2010 European Curling Championships – Women's tournament