Omonia (Greek: Ομόνοια, Omonoia) is an underground station under the Omonoia square of Athens, used by Athens Metro Lines 1 and 2.

The first station opened 1895, but was relocated underground and redesigned by the Hellenic Electric Railways (which operated Line 1 at the time) in 1930. In January 2000 the additional platforms for Line 2 were opened.

Interchanges

Trolleybuses	1	2	3	4	5	6	11	12	15
	21
Buses	A7	A11	A13	B9	B11	021	022	035	049
	051	054	057	060	224	227	608	622	732
	813	815	838	856	914
	Night Buses	500	790

Station layout

G Ground	-	Exits
C Concourse	Concourse	Customer Service, Tickets
Level L1	Side platform (Spanish solution), outbound
	Platform 1	← towards Piraeus (Monastiraki)
	Island platform (Spanish solution), inbound
	Platform 2	→ towards Kifissia (Victoria) →
	Side platform (Spanish solution), outbound
Level L2	Shops	Stores - ATMs
Level L3	Side platform, doors will open on the right
	Platform 1	← towards Anthoupoli (Metaxourgeio)
	Platform 2	→ towards Elliniko (Panepistimio)→
	Side platform, doors will open on the right