Welcome to Arlington County ...Time Zone: Arlington County lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time. The community of Arlington is the Seat for Arlington County. Arlington County was founded in 1801. From the Census Estimates for 2019, <1> Arlington had a population of 236,842 people. This is an increase of 13.16% since the last Census (which gave a population of 209,295 people in 2010). At the time of the 2010 Census, Arlington represented 2.62% of the total population of Virginia. Websites of Interest ...
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