Ukrainian Soviet Socialist Republic always represented itself.
The Ukrainian Soviet Socialist Republic ( Ukrainian SSR or UkrSSR or UkSSR ; Украї́нська Радя́нська Соціалісти́чна Респу́бліка , Украї́нська РСР Украи́нская Сове́тская Социалисти́ческая Респу́блика , Украи́нская ССР see `` Name '' section below ) , commonly referred to in English as Ukraine ( [ juːˈkreɪn ] Україна , tr . The Ukrainian SSR was a founding member of the United Nations , although it was legally represented by the All-Union state in its affairs with countries outside of the Soviet Union .