Pennsylvania has 15 Army bases: 4.5% of the US total of 332. That ranks #3 by count and #27 per person (0.11 per 100,000 residents) of 51.
Source: DoD Military Installations, Ranges and Training Areas (MIRTA), via the Bureau of Transportation Statistics, 2026. Every active installation the DoD lists under the Army, including its Reserve and National Guard sites, at the centre of its boundary, with its area in acres. Joint bases are listed under the branch that reports them.
Licence: U.S. government data: no copyright, free to reuse
Local blogs, news sites, parks pages: embed the live interactive map with one snippet. Attribution stays on, that's the whole deal.
<iframe src="https://get-instamaps.com/embed/rankings/army-bases/pennsylvania" width="100%" height="440" style="border:2px solid #111" loading="lazy" title="Pennsylvania army bases map — InstaMaps"></iframe>| # | Name | Details |
|---|---|---|
| 1 | Carlisle Barracks | Army · 448 acres |
| 2 | Defense Distrib Depot Susq | Army · 840 acres |
| 3 | Letterkenny Army Depot | Army · 17,953 acres |
| 4 | Lock Haven USARC | Army Reserve · 11 acres |
| 5 | New Castle AMSA 110 (G) | Army Reserve · 5 acres |
| 6 | NG Cambridge Springs Readiness Center and FMS 5 | Army National Guard · 104 acres |
| 7 | NG Collegeville FMS 4 | Army National Guard · 52 acres |
| 8 | NG Fort Indiantown Gap | Army National Guard · 17,872 acres |
| 9 | NG Hiller Readiness Center | Army National Guard · 10 acres |
| 10 | NG Hollidaysburg Readiness Center | Army National Guard · 21 acres |
| 11 | NG New Castle Readiness Center/FMS 9 | Army National Guard · 7 acres |
| 12 | NG Spring City Readiness Center | Army National Guard · 50 acres |
| 13 | Scranton Army Ammunition Plant | Army · 15 acres |
| 14 | Tobyhanna Army Depot | Army · 1,329 acres |
| 15 | USAR Keystone Ord Outdoor Tng | Army Reserve · 466 acres |
Names as the source gives them. Coordinates for every one are in the CSV.
"Pennsylvania has 15 Army bases, #3 in the US by count and #27 per person (DoD Military Installations, Ranges and Training Areas, 2026, mapped by InstaMaps)." Free to quote with a link to this page. Population: US Census 2024 estimates.