Penn named the county after Buckinghamshire, the county where he lived in England.He built a country estate called Pennsbury Manor in Falls Township, Bucks County.From north to south, it is linked to Warren, Hunterdon, Mercer and Burlington Counties in New Jersey by bridges.Tohickon Creek and Neshaminy Creek are the largest tributaries of the Delaware in Bucks County.Their successful attack on Britain's Hessian forces was a turning point in the American War of Independence. Census Bureau, the county has a total area of 622 square miles (1,610 km The southern third of the county between Philadelphia and Trenton, New Jersey, often called Lower Bucks, resides in the Atlantic Coastal Plain, and is flat and near sea level, and the county's most populated and industrialized area.The town of Washington Crossing, Pennsylvania and Washington Crossing Historic Park were named to commemorate the event. Bucks County shares a western border with Montgomery County, and also borders Philadelphia to the southwest, and Northampton and Lehigh Counties to the north.This ranked the county fourth in the state, well behind (more than 10%) the counties of Philadelphia with 1,553,165 (247% of Bucks), Allegheny with 1,231,527 (196%), Montgomery with 812,376 (130%), and well ahead of Delaware with 561,973 (89.6%).Growth began in the early 1950s, when William Levitt chose Bucks County for his second "Levittown". This time, developers took land in townships that were mostly untouched.
Males had a median income of ,587 versus ,984 for females. About 3.10% of families and 4.50% of the population were below the poverty line, including 4.80% of those under age 18 and 5.50% of those age 65 or over.21.50% of all households were made up of individuals and 8.10% had someone living alone who was 65 years of age or older.The average household size was 2.69 and the average family size was 3.17. For every 100 females age 18 and over, there were 93.40 males.Bucks County also is home to large and very prominent Roman Catholic and Jewish populations.The 2013 population estimate of Bucks County Pennsylvania was 626,976.