Svietlahorsk is a town in the Svietlahorsk District of Gomel Region, Belarus. It is the administrative center of the Svietlahorsk District. It is located by the Berezina River and has 67,054 inhabitants (2019 estimate).

Svietlahorsk-na-Biarezinie (Svietlahorsk on Biarezina) is also a railroad station on the Zhlobin - Kalinkavichy railway line.

Within Svietlahorsk there are many industrial activities and organizations, including the power plant, a chemical man-made fiber plant, a reinforced concrete industrial complex, a Petroleum producing industry, a pulp and paper milk industry, butter-making factory, a bakery, and an industrial college.

Within Svietlahorsk there is an Orthodox church and cathedral, a Catholic church, a quay, and a museum of local lore.