Quantico [kʷɔntɪkoʊ] is an unincorporated community and census-designated place in Wicomico County, Maryland, United States, along the former stage route from Vienna to the port of Whitehaven on the Wicomico River.

The house was built in 1790 with an addition added in 1810; the dates can be traced by the nails on the property.

The house and 3 acres (12,000 m2) were sold in 1798 and purchased in January by Henry Crawford, a tanner, who gave the property the name Chelsea.

Census records show that the house at the time had a log cookhouse, stable and meathouse, as well as other commercial buildings such as a tannery, shed, barkhouse and millhouse.

[citation needed] St. Bartholomew's Episcopal Church was listed on the National Register of Historic Places in 1975.