According to the United States Census Bureau, the city has a total area of 3.7 square miles (9.6 km2), all land.

Included is a 0.25-mile wide strip of annexed land along Interstate 40, from Prairie County's western border to the White River.

[3] Nearby towns are Des Arc, De Valls Bluff, Ulm and Fredonia (Biscoe).

The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

[7] The city of Hazen and its police department are featured in the Reelz documentary series On Patrol: Live.