Platea is a borough in Erie County, Pennsylvania, United States.

According to the United States Census Bureau, the borough has a total area of 3.4 square miles (8.7 km2), all land.

[6] As of the census[8] of 2000, there were 474 people, 172 households, and 137 families residing in the borough.

There were 184 housing units at an average density of 55.9 per square mile (21.6/km2).

13.4% of all households were made up of individuals, and 5.2% had someone living alone who was 65 years of age or older.