Arlington County is located in northern Virginia, directly across the Potomac River from Washington, D.C.. It is known for its vibrant communities, parks, and historical sites, including the famous Arlington National Cemetery. The county has a diverse population and offers a mix of urban and suburban living. The area is well-connected through public transportation, including the Washington Metro system, making it easy for residents to commute to the capital. Arlington is also home to several educational institutions and businesses, contributing to its reputation as a desirable place to live and work.