Broad Top City is a borough in Huntingdon County, Pennsylvania, United States. The population was 452 at the 2010 census, up from 384 at the 2000 census.Broad Top City is located in southwestern Huntingdon County at 40°12′6″N 78°8′23″W / 40.20167°N 78.13972°W / 40.20167; -78.13972. It is bordered to the north, west, and south by Carbon Township and to the east by Wood Township. The borough sits on top of a plateau at an elevation of 1,970 feet above sea level.Pennsylvania Route 913 passes through the center of the borough, leading west 2.5 miles to Dudley and southeast 2 miles to Robertsdale, downhill in both directions.According to the United States Census Bureau, the borough has a total area of 0.68 square miles, all of it land.As of the census of 2000, there were 384 people, 162 households, and 117 families residing in the borough. The population density was 600.8 people per square mile. There were 178 housing units at an average density of 278.5 per square mile.