Gaithersburg is a city in Montgomery County, Maryland, United States. It is located northwest of Washington, D.C., and is considered part of the Washington metropolitan area. Gaithersburg is known for its diverse population, strong economy, and numerous recreational and cultural attractions. The city is home to several large companies, including the National Institute of Standards and Technology (NIST) and MedImmune. Gaithersburg offers a range of amenities, including parks, shopping centers, and community events. It also has a strong education system, with numerous public and private schools.