Sânmihaiu de Câmpie (Hungarian: Mezőszentmihály) 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 (Mezősolymos) and Zoreni (Lompérd).

The commune is located in the southern part of the county, on the Transylvanian Plateau.

Sânmihaiu de Câmpie is traversed by county roads DJ151 and DJ162.

The commune has a train station that serves the Căile Ferate Române Line 406, which comes from Bistrița Bârgăului and Bistrița North [ro] and leads to the town of Luduș in Mureș County.