Papiu Ilarian (formerly Budiul de Câmpie; Hungarian: Mezőbodon [ˈmɛzøːbodon]) is a commune in Mureș County, Transylvania, Romania composed of five villages: Dobra (Dobratanya), Merișoru (Bugusalja), Papiu Ilarian, Șandru (Sándortelep), and Ursoaia (Urszajatelep).

The prefix "Mező", meaning 'field', in its Hungarian name refers to the Mezőség subregion where it lies.

Romanian politician Alexandru Papiu Ilarian was born here in 1828, and the commune was named after him in 1925.

The commune is situated on the Transylvanian Plateau, at an altitude of 361 m (1,184 ft), on the banks of the river Icland.

At the 2021 census, Papiu Ilarian had 827 inhabitants, 57.19% of whom were Hungarians and 41.23% Romanians.