Counties by Class

¨ Denotes Home Rule Counties

First Class

Population of 1,500,000 or more
- Philadelphia County¨

Second Class

Population of 800,000 to 1,499,999
- Allegheny County¨

Second Class A (2-A)

Population of 500,000 to 799,999

Third Class

Population of 210,000 to 499,999

Fourth Class

Population of 145,000 to 209,999

Fifth Class

Population of 90,000 to 144,999

Seventh Class

Population of 20,000 to 44,999

Eighth Class

Population of less than 20,000