[2] The primary responsibility of Jacksonville Center is sequencing and separation of over-flights, arrivals, and departures in order to provide safe, orderly, and expeditious flow of aircraft filed under instrument flight rules (IFR).
Jacksonville Center is the third busiest ARTCC in the United States.
[3] Jacksonville Center covers approximately 210,000 square miles (540,000 km2) of the Southern United States, including parts of Florida, Georgia, Alabama, South Carolina, and North Carolina.
ZJX also covers portions of the Atlantic Ocean and the Gulf of Mexico.
ZJX overlies or abuts several approach control facilities (Jacksonville, Orlando, Daytona Beach, Tampa, Valdosta, Tallahassee, Tyndall, Eglin, Pensacola, Mobile, Cairns, Atlanta, Savannah, Augusta, Beaufort, Charleston, Columbia, Myrtle Beach, Shaw, Florence, Wilmington, Fayetteville, Charlotte).