Updated Jun 10, 2026

Which blocs and alliances does Spain belong to?

Every diplomatic bloc and alliance Spain belongs to — and the allies, rivals, and neighbors that shape its votes.

Bloc memberships

EU27

27-member political and economic union with a single market and shared institutions.

+22

NATO

North Atlantic Treaty Organization — 32-member transatlantic defensive alliance.

+27

OECD

Organisation for Economic Co-operation and Development — 38 high-income democracies.

+33

Allies, rivals & neighbours

Allies

Organisation memberships

Memberships

Organizations

UNUNmember · 1955

EUEUmember · 1986

NATONATOmember · 1982

G20G20permanent-guest

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