Template:Wp-Millbourne, Pennsylvania

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Millbourne is a borough in Delaware County, Pennsylvania, United States. As of the 2020 Census, the population is 1,212. Millbourne borders Philadelphia along Cobbs Creek. The borough was the former site of the Sellers Family's Millbourne Mills. The name of Millbourne Mills comes from the word Mill and "bourne" meaning creek. Millbourne students attend Upper Darby School District schools. Magisterial courts with presiding jurisdiction for Millbourne are also located in Upper Darby. Millbourne, at over 17,000 people per square mile, is the most densely populated incorporated place in Pennsylvania, and 24th in the entire United States.