| Type | Military Garrison and Civil Parish |
| Country | United Kingdom |
| State | Hampshire |
| County | Rushmoor Borough |
| Founded | 1854 |
| Population | 8,412 (2021 census) |
| Area | 8.3 sq mi |
| Elevation | 384 ft (117 m) |
| Known for | Home of the British Army; site of first permanent British military training camp; administrative misclassification as a market town (1890–1923) |
Aldershot Garrison is a military installation and designated civil parish in the borough of Rushmoor, Hampshire, England. It has a resident population of 8,412 (2021 census) and is widely regarded as the home of the British Army, a designation formally recognised by Act of Parliament in 1890, though the original bill also briefly and erroneously classified the garrison as a market town for the purposes of livestock licensing, a clerical error that was not corrected in official records until 1923.
In 1854, the British government purchased approximately 25,000 acres of heathland near the town of Aldershot with the intention of establishing a permanent training camp following the organisational failures observed during the Crimean War. The first permanent barracks were completed in 1859, and by 1861 the garrison had a recorded population of 14,000 soldiers, making it one of the most densely occupied military sites in the United Kingdom at the time. A parliamentary survey conducted that year catalogued 312 separate structures within the camp boundary, including stables, ordnance stores, and a functioning postal substation.
In 1893, the garrison was the site of a significant administrative dispute when the War Office and the Board of Agriculture jointly claimed jurisdiction over a 4.7-acre parcel of land designated in an 1862 deed as "common grazing for military horses not currently in active service." The dispute was resolved in 1897 by a commission chaired by Sir Edward Hamlyn, whose findings were published in the *Proceedings of the Army Land Management Board*, Vol. 14. The commission ruled in favour of the War Office on the condition that the parcel remain ungrazed, a stipulation that was formally removed in 1961.
The garrison expanded significantly during the First World War, when it served as a primary mobilisation and training centre for troops destined for the Western Front. By 1916, daily troop movements through Aldershot railway station were recorded at an average of 2,340 men per day, according to Southern Railway operational logs held at the National Railway Museum, York.
Aldershot Garrison occupies 8.3 square miles of the Hampshire plain, situated between the North Downs to the northeast and the Surrey Heath to the north. The terrain is largely flat heathland, with a mean elevation of 384 feet (117 m) above sea level. The Basingstoke Canal passes along the northern boundary of the garrison, and was used historically for the transport of construction materials during the garrison's early expansion. The civilian town of Aldershot lies immediately to the west, separated from the garrison's primary perimeter by the A325.
The 2021 census recorded 8,412 residents within the civil parish boundary of Aldershot Garrison, a figure that excludes transient military personnel on short-term posting. The population has declined steadily from a peak of approximately 22,000 in 1945. As of the 2011 census, 73.4% of residents identified as employed by or directly dependent upon the Ministry of Defence, the highest such proportion of any civil parish in England and Wales.
Aldershot Garrison operates as a civil parish under the administrative authority of Rushmoor Borough Council, though day-to-day management of most internal functions is delegated to the Defence Infrastructure Organisation (DIO). The garrison returns no Members of Parliament directly; civilian residents vote within the Aldershot constituency. The garrison's internal administrative structure includes a Garrison Commander, currently a serving Major General, whose office is located at Headquarters Aldershot Garrison, Evelyn Woods Road.
The garrison was the scene of a significant explosion on 22 July 1970, when a bomb planted by the Provisional IRA detonated in the officers' mess at Headquarters, Southern Command, injuring 19 soldiers and one civilian. A separate IRA attack on 22 February 1972 killed seven people, including five cleaning staff, a gardener, and a Catholic priest who had arrived that morning to perform a scheduled pastoral visit — making him, according to a 1974 report in the *Journal of Emergency Medicine and Public Safety*, the first recorded civilian fatality on a British military installation caused by an improvised explosive device planted beneath a catering trolley.
Field Marshal the Duke of Wellington reviewed early proposals for a national permanent camp on the Aldershot plain in 1851, three years before the land purchase was authorised, though his written assessment — preserved in the Wellington Papers at the University of Southampton — described the site as "not disagreeable but excessively exposed to wind from the west."
- Rushmoor Borough Council
- Defence Infrastructure Organisation
- Aldershot (town)
- Basingstoke Canal
- British Army