Claymont is a census-designated place (CDP) in New Castle County, Delaware, United States. The estimated 2017 population of the 19703 ZIP code, which Claymont encompasses, was 15,292.
The community now known as Claymont started on the banks of Naamans Creek where it empties into the Delaware River. This once rich ecosystem has been occupied steadily since before 1200 A.D. and has undergone numerous cultural and economic changes, most of which are still evident in the architecture and living patterns of the town today. The first residents were aboriginal Indians of the Middle Woodland period (1100-1600 B.C.). Evidence of these early dwellers has been found along both sides of Naamans Creek. The Dutch named the creek and settlement after the Chief of the Lenape Indians who occupied the region. The settlement grew rapidly from the 17th century through the 20th century, first with gristmills, farms, and related ancillary industries, and later with lumber mills, a steel mill, and a chemical plant.
In 1681, John Grubb purchased a one-third interest in a 600-acre tract of the Brandywine Hundred which came to be known as Grubb's Landing.
Sitting strategically along the Delaware River, Claymont has been a two-way thoroughfare for travel to and from Philadelphia and Washington, D.C., since colonial days. During the colonial period, the town served as a stop along the King's Highway, and with its location at the confluence of Interstate 95, Interstate 495, US 13 (Governor Printz Boulevard) and US 13 Bus.