|Population statistics (as of 2001)|
|- Area:||4.324 km2 (2 sq mi)|
|- Density:||15600 /km2 (40405 /sq mi)|
|Time zone:||EET/EEST (UTC+2/3)|
|Elevation (center):||30 m (98 ft)|
Korydallos (Greek: Κορυδαλλός, Latin: Corydallus) is a municipality which belongs to Piraeus Prefecture, Greece in the western suburbs of Piraeus. It is the home of the Korydallos prisons. It sits on a mountain in the west named Aegaleo. It is located W of Athens, N of Piraeus and S of GR-8/E55 and Athinon Avenue.
Farming used to dominate the community and much of the area was and remains deforested. The western half is rocky. Today, urbanization covers the south, central, west-central and east.
It was founded in ancient times, and was one of the 100 municipalities in ancient Attica at the end of the 6th century BC. Theophilos Corydalleus (1563–1646) was a philosopher who lived in Corydallos. 200 years later, there was Emmanouil Koutsikaris named the area that time San skytalodromia, and was renamed Pachy or Pachi or Pahi/ In 1923, the village was renamed Korydallos. The population in 1928 was 2,500. In 1934, Korydallos became an autonomous commune until 1946 when it became a municipality and a city. The city now boasts a population of 60,000.
Korydallos has schools, lyceums, High schools, banks, a post office, and many squares (plateies). The main street Taxiarhon has become a well known shopping center with many fashion shops and boutiques. Korydallos also has some soccer teams,with Proodeftiki FC which has its own stadium at Grigoriou Lambraki street, and Aetos Korydallou being the most famous among them.
The international award winning Greek cult-film 'Spirtokouto' was filmed in Korydallos in 2003.