Reni is a small city in Izmail Raion, Odesa Oblast, southern Ukraine. It hosts the administration of Reni urban hromada, one of the hromada…Reni is a small city in Izmail Raion, Odesa Oblast, southern Ukraine. It hosts the administration of Reni urban hromada, one of the hromadas of Ukraine. Reni is located in the Bessarabian historic district of Budjak and on the left bank of the Danube. The settlement was founded around 1548, acquiring city status in 1821. Population: 17,736.