Was Spain Part of the USSR? No.

Spain was never part of the USSR.

• Spain: Southwestern Europe; monarchy (1939–1975 Franco), then parliamentary monarchy (1978 Constitution). NATO member (1982), EU member (1986).
• USSR: Union of Soviet Socialist Republics (1922–1991); Eastern Europe/Northern Asia; communist one-party state.

During the Cold War, Spain was anti-communist under Franco; after 1975, it democratized and joined Western alliances. The two entities were geopolitically opposed.