Ukraine was a nation-state on Earth, in eastern Europe. Its capital city was Kiev.

Doctor Viktor Lozinak of Ukraine was a key member of the Chrysalis Project in the 1970s. (TOS novel: The Rise and Fall of Khan Noonien Singh, Volume 1)

In 2045, Tatya Bilash, a Ukrainian native, gave the first report of alien visitors to Earth to her aunt Mariya, a reporter in Kiev. (TOS novel: Strangers from the Sky)

Ukrainia Novya, a Human colony world, was settled largely by Ukrainian natives, and their heritage is reflected in the architecture, music, popular culture, and spoken language of the colony. (FASA RPG module: The Orions: Book of Common Knowledge)

Starfleet's GZK computer cores are based there. (DS9 reference: Star Trek: Deep Space Nine Technical Manual)

Earth states, organizations and geographical regions
Planetary State	United Earth	International organizations	United Nations/New United Nations • Great Khanate • Optimum Movement
Africa	Pan-African Alliance	African Confederation (Somalia) • Egypt • Madagascar • Mali • Senegal • South Africa • United States of Africa (Kenya)
Asia and Siberia	Eastern Coalition	Afghanistan • China • India • Indonesia • Japan (Empire of Japan) • Kazakhstan • Korea (S. Korea) • Malaysia • Mughal Empire • Pakistan • Philippines • Russia • Soviet Union • Singapore • Thailand • Tibet
Europe	European Alliance • European Hegemony • European Union • Mediterranean Alliance • United States of Europe	Belgium • Bulgaria • Czechoslovakia • Denmark • France • German Democratic Republic • Germany • Gibraltar • Greece • Hungary • Iceland • Ireland • Italy • Netherlands • Norway • Poland • Portugal • Roman Empire • Serbia • Soviet Union • Spain • Switzerland • Turkey • Ukraine • United Kingdom (England, Scotland, Wales) • Yugoslavia
Middle East	Muslim Bloc	Arabia • Iran • Iraq • Israel • Lebanon • Turkey
North America	Caribbean Alliance	Canada • Confederate States of America • Cuba • Jamaica • Mexico • Panama • Puerto Rico • Tobago • Trinidad • United States of America
Oceania and Antarctica	Australia • Easter Island • New Zealand • Norfolk Island • Pitcairn • Solomon Islands
South America	Brazil • Chile • Venezuela