A.E.P. Olympias Patras (Greek: Α.Ε.Π. Ολυμπιάς Πάτρα) or Olympiadas Patras (Greek: Ολυμπιάδα Πάτρα), is a Greek multi-sport club that is located in Patras. It was founded in 1961. A.E.P. Olympias is one of the most historic athletic unions in Patras. The athletic union's team colors are orange and white. The club's current president is Nikolaos Bogonikolos.
The athletic union was founded in 1961, in a tavern that was owned by Birba, at Messolongiou and Fotila Streets. The first sporting club departments of the parent athletic association included: track and field, basketball, volleyball, and bicycling. The club's first board of directors meeting was held on December 26, 1961, and the club's first general assembly meeting took place on April 15, 1962.
The basketball team, Olympias Patras B.C., participated in the Greek A2 League from 1977 until 1981. They competed in the top Greek League in the 2006-07 season and the 2007-08 season. They also participated in the FIBA EuroCup during the 2007-08 season.
The women's basketball team has competed in the Greek B League since the 1989-90 season.
One of the most historic sports departments of the club is the men's volleyball club, which participated in the Greek Volleyball First Division in 1965-66, 1969–70, 2000–01, and 2001-02. From 1981-83, the men's volleyball club played in the Greek Volleyball Second Division, and in 1987, it played in the Greek Volleyball Third Division.