Consolidated city-county
City and County of Philadelphia
Flag Seal
Etymology: Ancient Greek: φίλος phílos (beloved, dear) and ἀδελφός adelphós (brother, brotherly)
Coordinates: 39°57′10″N 75°09′49″W / 39.95278°N 75.16361°W / 39.95278; -75.16361Coordinates: 39°57′10″N 75°09′49″W / 39.95278°N 75.16361°W / 39.95278; -75.16361
Country	United States
State	Pennsylvania
County	Philadelphia
Historic countries	Kingdom of England Kingdom of Great Britain
Historic colony	Kingdom of Great Britain Province of Pennsylvania
Founded	1682
Incorporated	October 25, 1701
Founded by	William Penn
Government
• Type	Mayor–council, consolidated city-county
• Body	Philadelphia City Council
• Mayor	Cherelle Parker (D)
Area
• Consolidated city-county	142.70 sq mi (369.59 km2)
• Land	134.28 sq mi (347.78 km2)
• Water	8.42 sq mi (21.81 km2)
Elevation	39 ft (12 m)
Population  (2020)
• Consolidated city-county	1,603,797
• Rank	6th in the United States 1st in Pennsylvania
• Density	11,943.68/sq mi (4,611.53/km2)
• Metro	6,245,051 (7th)
Time zone	UTC−5 (EST)
• Summer (DST)	UTC−4 (EDT)
ZIP Codes	19092–19093, 19099, 191xx
FIPS code	42-60000
GNIS feature ID	1215531
Major airport	Philadelphia International Airport
Interstates
U.S. Routes
Commuter rail	SEPTA Regional Rail, New Jersey Transit
Rapid transit	Broad Street Line, Market–Frankford Line, PATCO Speedline
Waterways	Delaware River Schuylkill River
Website	www.phila.gov

Philadelphia, colloquially Philly, is the 6th most populous city in the United States and the most populous city in the U.S. state of Pennsylvania.

The population of the city was 1,603,797 people in 2020. Philadelphia was the capital of the United States from 1790 to 1800. It was replaced by Washington, D.C. in 1800 after the White House was built.

Philadelphia has many tourist attractions. These include the Liberty Bell, Independence Hall, and Christ Church.