Electoral district 12 (Ukrainian: Одномандатний виборчий округ №12, Odnomandatnyi vyborchyi okruh №12), shortened to OVO No.12 (Ukrainian: ОВО №12) is one of 225 electoral districts that elects a member of parliament (people's deputy) to the Verkhovna Rada, Ukraine's national parliament.

[4] The electoral district is located in north-central Vinnytsia Oblast (province) in Ukraine, representing half of the province's administrative center, Vinnytsia, its districts, Leninskyi, Staromiskyi, and Zamostianskyi Raions; the urban-type settlements of Voronovytsia, Desna; and 33 villages.

[9] The electoral district was established in 1998 in preparation for the upcoming 29 March parliamentary election, carved out of the No.55 single-mandate constituency after a redistricting.

[25] In the 2002 elections, the Our Ukraine Bloc gained a significant portion of the vote with 30.15%, while the Yulia Tymoshenko Bloc was in second place with 20.39%, the Communist Party fell back to third place with 12.95%, and the Socialist Party of Ukraine gained 7.18%.

[27] In 2014, the Petro Poroshenko Bloc gained a significant portion of the constituency's vote, with 44.08%, while the People's Front (made up largely of representatives from the Fatherland party) won 17.96%.

[5] Anatoliy Drabovskyi from the Servant of the People party won the election as the district's MP with 33.22% of the vote.