Panionios G.S.S. Football Club, the Pan-Ionian Gymnastics Club of Smyrna, more commonly known as Panionios F.C. or simply Panionios, is a Greek football club based in Nea Smyrni, a suburban town in the Athens agglomeration, Greece. Part of Panionios G.S.S., Panionios F.C. is the oldest Greek football club.

Nea Smyrni Stadium is a multi-purpose stadium in Nea Smyrni, Greece. It is currently used mostly for football matches and is the home stadium of Panionios, which plays for the Gamma Ethniki. The all seated stadium holds 11,700 spectators and was built in 1939. Before full seating was installed in 1998 for the participation of Panionios in the UEFA Cup Winners' Cup its capacity was close to 19,000. The stadium is eligible to host UEFA Europa League matches and its football pitch dimensions are about average at 105x72m.