VISA INFORMATION
The foreigners enter (leave) Ukraine through checkpoints on the state border on the national passport and, if available, a visa if other order of entry is not set by law or international treaties of Ukraine.
Entry regime and visa requirements for foreigners entering Ukraine
http://mfa.gov.ua/en/consular-affairs/entering-ukraine/visa-requirements-for-foreigners
All categories of visas are issued by diplomatic missions and consular offices of Ukraine abroad