Sânmihaiu or Sânmihai ("Saint Michael") may refer to several places in Romania:
*
Sânmihaiu Almașului, a commune in Sălaj County
*
Sânmihaiu de Câmpie
Sânmihaiu de Câmpie () is a commune in Bistrița-Năsăud County, Transylvania, Romania. It is composed of six villages: Brăteni (''Mezőbarátfalva''), La Curte (''Köbölkútitanyák''), Sălcuța (''Fűzkút''), Sânmihaiu de Câmpie, Stupini ...
, a commune in Bistrița-Năsăud County
*
Sânmihaiu Român, a commune in Timiș County, and its village of Sânmihaiu German
*Sânmihai de Pădure, a village in
Beica de Jos Commune, Mureș County
*''Sânmihaiu'', the former name of
Mihai Viteazu Commune, Cluj County
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