Greenbrier, AR is a city located in Faulkner County, Arkansas and has a land area of 157.31 square miles (407.43 km2). The water area for the city is 0.14 square miles or 0.36 km2. There is one unique zip code in Greenbrier, Arkansas and it is 72058. The area code(s) for Greenbrier is 501.
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