Ubon Ratchathani

Across the river on the south bank lies the town of Warin Chamrap, with which Ubon Ratchathani forms a functionally integrated twin-city conurbation: although the two remain separate municipalities linked by road bridges, decades of urban expansion have produced a single, largely continuous built-up area, and the two local governments have since the 2020s coordinated a joint comprehensive urban plan covering both jurisdictions. According to registration statistics compiled by the Department of Provincial Administration, the combined population of the municipalities and subdistricts making up the conurbation was approximately 390,886 as of December 2025 — around 224,338 on the Ubon Ratchathani side and 166,548 on the Warin Chamrap side.