Millvale is a borough in Allegheny County, Pennsylvania, along the Allegheny River, opposite Pittsburgh, and off of Pennsylvania Route 28. The population was 3,744 at the 2010 census.
Millvale is located at 40°28′59″N 79°58′25″W (40.482968, -79.973725).
According to the United States Census Bureau, the borough has a total area of 0.7 square miles (1.8 km2), of which 0.6 square miles (1.6 km2) is land and 0.1 square miles (0.26 km2), or 9.72%, is water.
Millvale is located at the confluence of Girtys Run and the Allegheny River. Much of the borough is on a floodplain and has been subjected to extensive flooding at many times during its history.
Millvale has three land borders with Shaler Township from the northwest to east, the Pittsburgh neighborhood of Troy Hill to the southwest, and Reserve Township to the west. Across the Allegheny River, Millvale runs adjacent with Lower Lawrenceville and Central Lawrenceville. Millvale regularly collaborates with its northern riverside neighbors of Etna and Sharpsburg.
School tax millage rate – The Shaler School District (shared with Shaler, Etna and Reserve Township) in 2017 was 23.28. This was ranked the 16th highest/most expensive out of Allegheny County's 45 school districts between Cornell SD (15th highest) and Riverview SD (17th highest).
As of the census of 2000, there were 4,028 people, 1,839 households, and 959 families residing in the borough. The population density was 6,187.1 people per square mile (2,392.6/km²).