St. Casimir Catholic Church, Catholic church in Lahojsk, Belarus.

St. Casimir Catholic Church is a light-beige church built in 1999 to a design by architect M. Kalechits. Its rectangular plan is flanked by transept wings, with a steep two-pitch roof and a four-sided bell tower attached asymmetrically to the facade. Flat facades are divided into two tiers by arched and rectangular windows and pilaster strips.

Count Alexander Tyszkiewicz founded the first church in 1604 after his conversion to Catholicism. The wooden building burned in 1655 during the war between the Polish-Lithuanian Commonwealth and the Russian Tsardom. A stone church begun in 1787 was completed in 1793 by his son Wincenty, closed in 1950 and later demolished. The parish was revived in 1991, and the new church was consecrated on 19 June 1999.

The parish has existed since 1609, and the church stands beside the foundations of the earlier Church of the Nativity of the Virgin Mary and St. Casimir, demolished under Soviet rule. Count Konstanty Tyszkiewicz's grave and monument stand next to the church.

The church can be easily reached from the street and offers multiple entrances for visitors. Parking spaces are available nearby, making it convenient to visit for services or exploration.

The church stands beside the foundations of the earlier Church of the Nativity of the Virgin Mary and St. Casimir, demolished under Soviet rule. The parish itself dates to 1609, and the present building was consecrated on 19 June 1999, less than a decade after the land was returned to the Roman Catholic Church in 1991.