The Department of Defense in the United States is not a single office you can walk into. It is the largest federal department, covering the Army, Navy, Air Force, Marine Corps, Space Force and dozens of agencies. Alongside it sit separate state departments that manage each state's National Guard. Our directory holds 66 listings across 25 states, from the Pentagon to small recruiting stations. This page explains what those listings are, which level of government runs each one, and how to choose the right state page before you call or drive anywhere.

How the Department of Defense Is Organized Across the United States

The federal department is led by the Secretary of Defense from the Pentagon. Our database lists the Pentagon at 1000 Defense Pentagon, Washington, phone 703-697-6114. The building itself stands in Arlington County, Virginia, even though its mail carries a Washington address. Directory labels and real county lines do not always match, so confirm the location when it matters.

Beneath the Secretary are three military departments: Army, Navy and Air Force. The Marine Corps sits within the Navy, and the Space Force sits within the Air Force. Defense agencies handle specialized jobs. Two of our listings are Defense Contract Audit Agency offices, one at 453 South Webb Road in Wichita and one at 6615 Main Street in Stratford, Connecticut. Auditors there review the books of companies that hold military contracts. They are not public service counters.

Other entries support service members directly. The Army and Air Force Exchange Service Headquarters at 3911 South Walton Walker Boulevard in Dallas runs the stores and services on many installations. Army Continuing Education Services, at 4600 Strom Thurmond Boulevard in Columbia, South Carolina, helps soldiers with schooling. The American Battle Monuments Commission, listed at 2300 North Clarendon Boulevard in Arlington, cares for U.S. military cemeteries and memorials overseas, although it is formally an independent federal agency.

Federal, State, County and City Roles in the United States

Four levels of government touch defense work, and each does something different.

  • Federal: The Pentagon, the military departments, bases, recruiting offices and Military Entrance Processing Stations. Congress funds them, and the rules are the same in every state.
  • State: Each state has a National Guard led by its governor and managed by an adjutant general. Many states house this in an agency called the Department of Defense. Our listings include the Georgia State Department of Defense at 901 Adderton Street in Americus, the Hawaii State Department of Defense at 3949 Diamond Head Road in Honolulu, and the Maine State Department of Defense at 194 Winthrop Street in Augusta.
  • County: Counties do not run defense offices. Many employ veterans service officers who help with benefit claims, and county emergency managers coordinate with the Guard during floods, storms and other disasters.
  • City: Cities rarely operate anything in this category. A name like Troy Military Base, listed at 1172 Kirts Boulevard in Oakland County, Michigan, tells you where a facility sits, not who runs it.

Because of this split, the same phrase can point to very different offices. A state Department of Defense answers to a governor. A federal recruiting station answers to a military service headquartered in the Pentagon. Check the name and the phone number before you decide who can help.

How Rules, Services and Fees Differ Between States

Federal rules do not change at a state line. Enlistment standards, aptitude testing, pay scales and base access procedures are set nationally. A recruiter in Alamogordo, New Mexico, follows the same eligibility rules as one in Escondido, California.

State rules differ in the services built around the Guard and the military community. States decide their own tuition assistance for Guard members, pay during state emergencies, youth programs and how emergency management is organized. Hawaii's state department includes the state emergency management agency, while Maine's agency is formally named the Department of Defense, Veterans and Emergency Management. Some states tax military retirement pay and others do not, so check your state revenue department before you relocate.

Fees are rarely an issue at the federal level. Recruiting, aptitude testing and medical processing cost applicants nothing. Costs usually show up in state programs or private services, not in federal enlistment. If anyone asks you to pay for an enlistment step, stop and verify with the office directly.

What to Bring Before You Visit a Defense Office in the United States

Recruiting offices are the most common reason people visit. Our listings include Navy recruitment at 728 East Valley Parkway in Escondido and at 520 South George Nigh Expressway in McAlester, Oklahoma. They also include Marine Corps recruitment at 3199 North White Sands Boulevard in Alamogordo. Bring a government photo ID, your Social Security card, a birth certificate, and your diploma or transcripts. Write down your medical history and any prescriptions. Applicants who are 17 need a parent or guardian's consent.

Applicants later report to a Military Entrance Processing Station, such as the one at 3534 Whitehall Park Drive in Charlotte, phone 704-665-6620. There they complete a medical exam, aptitude testing if it has not been done yet, and the enlistment oath. Bring glasses, ID and the paperwork your recruiter lists, and expect a long day.

Bases work differently. Offutt Air Force Base in Sarpy County, Nebraska, and Francis E. Warren Air Force Base in Laramie County, Wyoming, are working installations, not public buildings. Visitors usually stop at a visitor center, show a valid photo ID, and may need vehicle registration and proof of insurance. A sponsor or an advance call often speeds entry. Both appear in our database with phone numbers, 402-294-5875 and 307-773-4390, so call before you drive out.

Choosing the Right State Page and Avoiding Common Mistakes

Pick the state page by the office's physical location, not by where its parent command sits. Georgia has the most listings in our database at 12, so Department Of Defense in Georgia is worth scanning county by county. Department Of Defense in North Carolina follows with 8, including the Charlotte processing station. For headquarters-level offices, check Department Of Defense in Virginia and Department Of Defense in District Of Columbia, because Pentagon-area addresses cross the Potomac River boundary.

Mistakes that waste a trip

Do not go to a defense office for Department of Veterans Affairs benefits. Health care, disability compensation and the GI Bill are handled by the VA, and a county veterans service officer can help you file.

Do not request old service records from a base. Those are held by the National Personnel Records Center in St. Louis, and veterans or next of kin can ask for them online or by mail.

Do not assume a listing name is current. Entries such as the 875th Replacement in Fort Dodge, Iowa, may reflect older unit or program names. Phone first to confirm the office still operates at that address and ask about its hours.

Finally, do not arrive unannounced at a base. Call the listed number, ask what ID and appointment you need, and confirm hours.

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What Our United States Defense Listings Show by Region

The 66 entries in our database cluster where military communities are largest. The Southeast leads, with Georgia at 12 listings, North Carolina at 8 and South Carolina at 5. California has 5, including the Navy recruitment office in Escondido, and Texas has 4, including the Exchange Service headquarters in Dallas.

The remaining listings spread widely. Iowa has the 875th Replacement entry in Fort Dodge. Tennessee has an Air Force Department office at 907 Rivergate Parkway in Goodlettsville, Davidson County. Mississippi has a similar entry at 1306 Goodman Road East in Southaven, DeSoto County. Florida's Fort Lauderdale Military Base sits at 299 East Broward Boulevard in Broward County.

Counts reflect what our records contain, not the size of the military presence in a state. Many installations have no public counter and appear only through their support offices. Use the listings as a starting point, then call to confirm services, hours and appointment rules before visiting.

Entry types also vary. Recruiting stations welcome walk-ins during business hours, though appointments save time. Support offices such as education centers often serve only ID holders. State departments, including the Hawaii and Maine offices, handle Guard and emergency matters and answer public questions by phone. Ask which kind of office you are calling at the start.

Frequently Asked Questions About Defense Offices in the United States

Both exist, and they are separate. The federal Department of Defense runs the armed services from the Pentagon and is funded by Congress. Each state also has a military organization that commands its National Guard under the governor, often called a state Department of Defense or Military Department. Georgia, Hawaii and Maine appear in our listings with offices in Americus, Honolulu and Augusta. When a listing begins with US Department of Defense, it is federal. When it begins with a state name, it is a state agency that answers to that state's governor and legislature.

Start with the state page for where you live, then look for recruitment or Military Entrance Processing Station entries. Our database includes Navy recruiters in Escondido, California, and McAlester, Oklahoma, a Marine Corps recruiter in Alamogordo, New Mexico, and a processing station in Charlotte, North Carolina. Call first to book a time, since recruiters often meet by appointment and may work from several locations. Each service has its own recruiters, so ask whether the office handles the branch you want. Bring photo ID and your Social Security card to the first meeting.

Requirements are set by each installation, but the basics are similar. Expect to stop at a gate or visitor center, show a valid government photo ID, and allow time for a background check. Drivers may be asked for vehicle registration and proof of insurance. A sponsor who works on the base, or an advance call to the office you are visiting, often makes entry easier. Bases such as Offutt in Nebraska and F.E. Warren in Wyoming may change procedures with security conditions, so confirm by phone before your trip.

Not from a base or a local defense office. Official personnel records for discharged service members are held at the National Personnel Records Center in St. Louis, Missouri. Veterans and next of kin can submit a request online or by mail. Include the full name, service branch and dates of service, and a service number or Social Security number if you have one. Active-duty members should ask their unit personnel office instead. A county veterans service officer can often help you file the request when you need discharge papers for a benefit claim.

No. Veterans benefits belong to the Department of Veterans Affairs, which handles disability compensation, VA health care, home loan guarantees and the GI Bill. Defense offices serve people who are on duty, applying to serve, or working for the military. If you are a veteran with a claim, a county or state veterans service officer can help you file at no cost. Some state departments, such as the one on Department Of Defense in Hawaii, include veterans-related functions and can point you to the right contact, but the VA makes the benefit decisions.

Our pages follow the state and county in each office's address. Southaven, in DeSoto County, sits just south of the Tennessee line and belongs to the Memphis metro area, so searchers sometimes look for it under Tennessee. The Air Force Department entry at 1306 Goodman Road East is filed under Mississippi because that is where the address falls. If you do not see an office you expect, check the neighboring state's page, such as Department Of Defense in Tennessee, which includes the Goodlettsville listing in Davidson County.

Some may not. Our listings come from public business records, and military names change when units merge, relocate or close. Entries such as Armstrong Laboratory in Phoenix, the 875th Replacement in Fort Dodge, Iowa, or DeWitt Military Base in Syracuse may reflect older or informal names. Call the listed number, ask which organization is at that address now, and confirm hours before traveling. A two-minute call can save a long drive. If the line is disconnected, check the main installation's official website or the state page for nearby active offices.