Jacksonville is home to three US naval facilities.
Together with the nearby Naval Submarine Base Kings Bay, Jacksonville is the third-largest naval complex in the country.
Only Norfolk, Virginia and San Diego, California are bigger.
The United States military is the largest employer in Jacksonville and its total economic impact is approximately $6.1 billion annually.
Several veterans' service organizations are also headquartered in Jacksonville, including Wounded Warrior Project.

Naval Air Station Jacksonville is a military airport located 4 miles (6 km) south of the central business district.
Approximately 23,000 civilian and active-duty personnel are employed on the base.
There are 35 operational units/squadrons assigned there.
Support facilities include an airfield for pilot training, and a maintenance depot capable of tasks ranging from changing a tire to intricate micro-electronics, or total engine disassembly.
Also on-site is a Naval Hospital, a Fleet Industrial Supply Center, a Navy Family Service Center, and recreational facilities.

Naval Station Mayport is a Navy Ship Base that is the third-largest fleet concentration area in the U.S. Mayport has a busy harbor capable of accommodating 34 ships, and an 8,000-foot (2,400 m) runway capable of handling any aircraft used by the Department of Defense.
Until 2007, it was home to the aircraft carrier USS John F. Kennedy, which locals called "Big John".
In January 2009, the Navy committed to stationing a nuclear-powered carrier at Mayport when the official Record of Decision was signed.
The port will require approximately $500 million in facility enhancements to support the larger vessel, which would take several years to complete.
The carrier was projected to arrive in 2019; however, an amphibious group was sent before the carrier.

Blount Island Command is a Marine Corps Logistics Base whose mission is to support the Maritime Prepositioning Force (MPF).
This provides for rapid deployment of personnel to link up with pre-positioned equipment and supplies embarked aboard forward-deployed Maritime Prepositioning Ships (MPS).

USS Jacksonville, a nuclear-powered Los Angeles-class submarine, is a U.S. Navy ship named for the city.
The ship's nickname is The Bold One and Pearl Harbor is her home port.

The Florida Air National Guard is based at Jacksonville International Airport.

Coast Guard Sector Jacksonville is located on the St. Johns River next to Naval Station Mayport.
Sector Jacksonville controls operations from Kings Bay, Georgia, south to Cape Canaveral.
CGC Kingfisher, CGC Maria Bray, and CGC Hammer are stationed at the Sector.
Station Mayport is co-located with Sector Jacksonville and includes 25-foot (7.6 m) response boats, and 47-foot (14 m) motor lifeboats.
Jacksonville is home to three US naval facilities. Together with the nearby Naval Submarine Base Kings Bay, Jacksonville is the third-largest naval complex in the country. Only Norfolk, Virginia and San Diego, California are bigger. The United States military is the largest employer in Jacksonville and its total economic impact is approximately $6.1 billion annually. Several veterans' service organizations are also headquartered in Jacksonville, including Wounded Warrior Project.
Naval Air Station Jacksonville is a military airport located 4 miles (6 km) south of the central business district. Approximately 23,000 civilian and active-duty personnel are employed on the base. There are 35 operational units/squadrons assigned there. Support facilities include an airfield for pilot training, and a maintenance depot capable of tasks ranging from changing a tire to intricate micro-electronics, or total engine disassembly. Also on-site is a Naval Hospital, a Fleet Industrial Supply Center, a Navy Family Service Center, and recreational facilities.
Naval Station Mayport is a Navy Ship Base that is the third-largest fleet concentration area in the U.S. Mayport has a busy harbor capable of accommodating 34 ships, and an 8,000-foot (2,400 m) runway capable of handling any aircraft used by the Department of Defense. Until 2007, it was home to the aircraft carrier USS John F. Kennedy, which locals called "Big John". In January 2009, the Navy committed to stationing a nuclear-powered carrier at Mayport when the official Record of Decision was signed. The port will require approximately $500 million in facility enhancements to support the larger vessel, which would take several years to complete. The carrier was projected to arrive in 2019; however, an amphibious group was sent before the carrier.
Blount Island Command is a Marine Corps Logistics Base whose mission is to support the Maritime Prepositioning Force (MPF). This provides for rapid deployment of personnel to link up with pre-positioned equipment and supplies embarked aboard forward-deployed Maritime Prepositioning Ships (MPS).
USS Jacksonville, a nuclear-powered Los Angeles-class submarine, is a U.S. Navy ship named for the city. The ship's nickname is The Bold One and Pearl Harbor is her home port.
The Florida Air National Guard is based at Jacksonville International Airport.
Coast Guard Sector Jacksonville is located on the St. Johns River next to Naval Station Mayport. Sector Jacksonville controls operations from Kings Bay, Georgia, south to Cape Canaveral. CGC Kingfisher, CGC Maria Bray, and CGC Hammer are stationed at the Sector. Station Mayport is co-located with Sector Jacksonville and includes 25-foot (7.6 m) response boats, and 47-foot (14 m) motor lifeboats.
Jacksonville, Florida