Holargos (Greek: Χολαργός, also: Cholargos) is a town and a suburb in the Athens urban area, Greece, located northeast of the Athens city proper and about 6 kilometers (3.7 miles) away from Syntagma Square. Since the 2011 local government reform it is part of the municipality Papagou-Cholargos, of which it is the seat and a municipal unit. The municipal unit has an area of 3.950 km. The main thoroughfare is Mesogeion Avenue, which connects Cholargos with central Athens and the A6 motorway.

Cholargos was the name of a deme of ancient Attica. The most prominent citizen of ancient Cholargos was Pericles. Cholargos was part of the community of Chalandri until 1933, when it became a separate community. It became a municipality in 1963.

Cholargos, as most of Attica, features a typical Mediterranean climate with hot, dry summers and cool, wet winters. Because of its location at the base of mountain Hymettus, Cholargos is strongly influenced by cold air masses that travel down the mountain, hence it is cooler that most of Athens, like downtown Athens or seaside locations.

Below is the data for the Nomismatokpeio Station. The station is active since 1 July 2020, so 2021 is the only year which was registered whole.

The following chart is not highly accurate, since it features only one year of record, but can be used as a guideline.

Year	Population
1981	31,703
1991	33,691
2001	32,166
2011	30,840
2021	31,304

The headquarters of the Ministry of Infrastructure, Transport and Networks are in Cholargos.

• 
  City's aesthetic
• 
  Cholargos municipal park
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  Agia Triada Church
• 
  Urban neighbourhood

• List of settlements in Attica
• Holargos B.C.

• Official website (in Greek)