Hazen is a city in Prairie County, Arkansas, United States. The population was 1,637 at the 2000 census. According to the United States Census Bureau, the city has a total area of 3.7 square miles 9.6 square kilometer, all of it land. Included is a 0.25-mile wide strip of annexed land along Interstate 40 in the entire Prairie County. Nearby towns are Des Arc, De Valls Bluff, Ulm and Fredonia (Biscoe).