Philadelphia

United States

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Philadelphia is one of the oldest and most historically significant cities in the United States, located in the northeastern part of the country. The city has a population estimated at 1,558,980 inhabitants (2026 estimate). Founded in 1682 by William Penn, Philadelphia played a central role in American history as the meeting place of the Founding Fathers. It was here that the Declaration of Independence and the United States Constitution were drafted and signed.

Today, Philadelphia is a major cultural, economic, and educational center. Its most famous landmarks include the Independence Hall, the Liberty Bell, and the Philadelphia Museum of Art. The city has also produced many notable figures, including actress Grace Kelly, basketball legend Kobe Bryant, and actor and musician Will Smith.

Philadelphia in United States

Population 1,558,980 (2026 estimate)
Area 369.6 km²
Elevation 12 m
Density 4,218 inh./km²
Coordinates 40.0° N
75.2° W

Philadelphia Population Evolution

The following curve shows the evolution of Philadelphia population between 1790 and 2024. Between 2000 and 2024, the population of Philadelphia has increased by 0.15% per year on average.

The population of Philadelphia in 2026 is estimated to 1,558,980 inhabitants. This estimate is taken from our extrapolation of available data and not an official estimate.

Population Summary

Year Population Change
1790 28,522
1850 121,376 +325.6%
1910 1,549,008 +1,176.2%
1970 1,948,609 +25.8%
2024 1,573,916 -19.2%

Interactive Map of Philadelphia

📍 Points of Interest

What to see in Philadelphia

Independence Hall

Liberty Bell

Philadelphia Museum of Art

Philadelphia City Hall

Comcast Center

First Bank of the United States

Elfreth's Alley

alley

Famous People Born in Philadelphia

Noam Chomsky

writer
Born 1928

Grace Kelly

stage actor
Born 1929 - Died 1982

American actress and Princess consort of Monaco

Will Smith

actor
Born 1968

American actor, film producer and rapper

Bradley Cooper

screenwriter
Born 1975

American actor

Kobe Bryant

basketball player
Born 1978 - Died 2020

American basketball player

Sister Cities of Philadelphia

Sister cities, also known as twin cities, are formal partnerships between cities in different countries to promote cultural and commercial ties.

This list is based on publicly available structured data and may differ slightly from official municipal publications.

City Country Population
Tianjin 🇨🇳 People's Republic of China 13,866,009
Incheon 🇰🇷 South Korea 3,049,315
Douala 🇨🇲 Cameroon 2,768,436
Nizhny Novgorod 🇷🇺 Russia 1,198,245
Frankfurt 🇩🇪 Germany 775,790
Tel Aviv 🇮🇱 Israel 467,875
Florence 🇮🇹 Italy 360,930
Toruń 🇵🇱 Poland 198,273

Other facts about Philadelphia

Sources & References

#1846 — Last update: 24 March 2026