Derwood is an unincorporated area and census-designated place in east-central Montgomery County, Maryland, United States. It lies just north of Rockville, southeast of Gaithersburg, southwest of Olney, and northwest of the greater Silver Spring area. Derwood was originally "Deer Park" and was then "Deer Wood" before getting its current name.

Maryland Route 200, also known as the Intercounty Connector or ICC, is an 18.8-mile (30.3 km) controlled-access toll road in the U.S. state of Maryland. It connects Gaithersburg in Montgomery County and Laurel in Prince George's County, both of which are suburbs of Washington, D.C. The ICC was one of the most controversial Maryland road projects; opposition to the highway stalled the project for decades, and construction did not begin until 60 years after the highway's initial approval.