Until 18 July 2020, Novosilske belonged to Reni Raion. The raion was abolished in July 2020 as part of the administrative reform of Ukraine, which reduced the number of raions of Odesa Oblast to seven. The area of Reni Raion was merged into Izmail Raion.[2][3] In 2001, 92.2% of the population spoke Romanian as its native language, while 3.22% spoke Russian and 2.1% spoke Ukrainian.[4]