South Korea vs United States of America Military Comparison
Side-by-side military strength: active personnel, defense budgets, air force aircraft, and naval assets.
South Korea
600K active troops
$50B budget
VS
United States of America
1M active troops
$800B budget
2,321
Tanks
6,612
3,100
Armored Vehicles
45,193
3,536
Artillery
2,837
600
Rocket Systems
1,366
406
Fighter Jets
1,957
833
Helicopters
5,400
234
Warships
472
22
Submarines
68
Nuclear Arsenal
United States of America
LARGEST
5,044
WARHEADS
South Korea
NON-NUCLEAR
0
WARHEADS
Warheads Over Time
Estimated total warhead inventories — Federation of American Scientists / SIPRI
Defense Budget vs GDP
Historical defense spending and how it compares to each country's GDP. The % of GDP view normalises for economic size so smaller economies aren't drowned out by absolute dollar figures.
Defense Budget Over Time ($B)
Defense Budget as % of GDP
Source: World Bank Open Data API (MS.MIL.XPND.CD)
Military Active Personnel
United States of America
LARGEST
1.35M
TROOPS
South Korea
41.2% OF LARGEST
555K
TROOPS
United States of America has 2.43× the active personnel of South Korea
Air Force Total Aircraft
United States of America
LARGEST
13.3K
AIRCRAFT
South Korea
11.9% OF LARGEST
1.58K
AIRCRAFT
United States of America has 8.41× the aircraft of South Korea
Total Naval Assets
Land Forces — Detailed Metrics
| Metric |
South Korea
|
United States of America
|
|---|---|---|
| Active Personnel | 555,000 | 1,347,300 |
| Reserve Personnel | 3,100,000 | 799,500 |
| Total Military Personnel | 3,655,000 | 2,146,800 |
| Defense Budget (USD) | $46,700,000,000 | $816,000,000,000.0 |
| Tanks | 2,321 | 6,612 |
| Armored Vehicles | 3,100 | 45,193 |
| Self-Propelled Artillery | 1,836 | 1,498 |
| Towed Artillery | 1,700 | 1,339 |
| Rocket Projectors | 600 | 1,366 |
Air Force — Detailed Metrics
| Metric |
South Korea
|
United States of America
|
|---|---|---|
| Total Aircraft | 1,581 | 13,300 |
| Fighters | 406 | 1,957 |
| Attack Aircraft | 0 | 2,800 |
| Transport Aircraft | 49 | 945 |
| Trainer Aircraft | 293 | 2,600 |
| Helicopters | 833 | 5,400 |
| Attack Helicopters | 112 | 983 |
Naval Forces — Detailed Metrics
| Metric |
South Korea
|
United States of America
|
|---|---|---|
| Total Naval Assets | 234 | 472 |
| Aircraft Carriers | 1 | 11 |
| Destroyers | 12 | 73 |
| Frigates | 13 | 0 |
| Corvettes | 34 | 23 |
| Submarines | 22 | 68 |
| Patrol Vessels | 111 | 13 |
| Mine Warfare Vessels | 11 | 8 |
See economy, trade, demographics, and more for this comparison.
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Data compiled from World Bank, IMF, Global Firepower, SIPRI, Numbeo, and Pew Research.
Last updated June 2026.
Sources & methodology