Luizi-Călugăra (Hungarian: Lujzikalagor) is a commune in Bacău County, Western Moldavia, Romania.

Luizi-Călugăra was established in the 18th century by Hungarian Catholic settlers.

During the 20th century, Romanianisation linguistically assimilated the Hungarian population.

At the 2002 census, 99.7% of inhabitants declared themselves as ethnic Romanians, 0.2% as Csangos and 0.1% as Hungarians.

98.6% were Roman Catholic, 1.1% Romanian Orthodox and 0.2% Seventh-day Adventist.