Creekside is a borough in Indiana County, Pennsylvania, United States. The population was 309 at the 2010 census.Creekside is located at 40°40′49″N 79°11′29″W / 40.68028°N 79.19139°W / 40.68028; -79.19139.According to the United States Census Bureau, the borough has a total area of 0.2 square miles, all of it land.As of the census of 2000, there were 323 people, 148 households, and 93 families residing in the borough. The population density was 1,455.0 people per square mile. There were 153 housing units at an average density of 689.2 per square mile. The racial makeup of the borough was 98.76% White, 0.62% African American, and 0.62% from two or more races. Hispanic or Latino of any race were 0.31% of the population.There were 148 households, out of which 25.0% had children under the age of 18 living with them, 49.3% were married couples living together, 12.8% had a female householder with no husband present, and 36.5% were non-families. 31.