Navy comparison: 
Iran vs 
United States
United States's 553-ship navy outnumbers Iran's 142 vessels (3.9:1 advantage). Of these, 112 and 233 are in active service respectively.
SEAS (Sea Equipment Aggregate Strength) Index face-off Full ranking →
IranWorld #57
6.9
SEAS Index / 100
United States leads on 8 of 10 categories
United StatesWorld #1
100.0
Iran
United States
Bars: weighted contribution to the SEAS Index (hulls × category weight × size, era and propulsion factors, minor vessels capped at 30 % of the combatant points; the air-wing, sustainment, armament and availability multipliers apply on top) · figures: active hulls at each side's latest inventory year · Methodology
Key figures as of 2026
| Iran | United States | Ratio | |
|---|---|---|---|
| Official name | Islamic Republic of Iran Navy | United States Navy | |
| Total ships | 142 | 553 | 🇺🇸 3.9× |
| Active ships | 112 | 233 | 🇺🇸 2.1× |
| On order / planned | 0 | 66 | 🇺🇸 |
| Submarines | 2 | 64 | 🇺🇸 32× |
| Principal surface combatants | 0 | 85 | 🇺🇸 |
| Aircraft carriers | 0 | 11 | 🇺🇸 |
| Amphibious ships | 9 | 39 | 🇺🇸 4.3× |
Show full breakdown · 5 more rowsHide the 5 extra rows
| Corvettes | 0 | 27 | 🇺🇸 |
| Patrol boats | 46 | 0 | 🇮🇷 |
| Mine warfare | 1 | 4 | 🇺🇸 4.0× |
| Coastal boats | 15 | 0 | 🇮🇷 |
| Auxiliaries | 39 | 3 | 🇮🇷 13× |
Backbone classes one per tier held
🇮🇷 IranKilo-class ×2
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Analyst Assessment
Verdict
Edge: United States
The United States Navy holds an overwhelming and structural advantage over the Islamic Republic of Iran Navy, fielding 11 carriers, 85 principal surface combatants and 64 submarines against an Iranian fleet with no major surface combatants and two Kilo-class boats. Iran's relevance is confined to dense, short-range coastal and littoral denial in and around the Strait of Hormuz, where numbers of small craft and geography partly offset the qualitative gap.
Domain by domain
Surface combatants
Edge: United States
🇮🇷 IranNo cruisers, destroyers or frigates on file; the surface force is 46 patrol boats and 15 coastal craft such as La Combattante II, Mk III and C 14 — short-legged, lightly armed, missile- and swarm-oriented.
🇺🇸 United States85 principal combatants, led by 75 Arleigh Burke destroyers and 7 Ticonderoga cruisers with Aegis and vertical-launch cells, plus 27 Independence and Freedom corvettes for littoral tasks.
Submarines
Edge: United States
🇮🇷 IranTwo Kilo-class diesel-electric boats, quiet in shallow, acoustically difficult Gulf waters, complemented by 14 Ghadir midget craft counted as coastal boats; endurance and reach are minimal.
🇺🇸 United States64 boats, all nuclear-powered: 26 Virginia and 18 Los Angeles attack submarines plus 17 Ohio-class, with 15 more Virginia and 3 Columbia on order — unlimited-range strike and ASW.
Carriers & naval aviation
Edge: United States
🇮🇷 IranNo aircraft carriers and no organic fixed-wing naval aviation; sea-denial rests on shore-based aircraft, missiles and small craft rather than embarked air power.
🇺🇸 United States11 carriers — 10 Nimitz-class with 4 Gerald R. Ford-class on order — supported by 38 amphibious ships able to embark rotary and short-take-off aviation.
Coastal & mine warfare
Edge: Iran
🇮🇷 IranThe core competency: 46 patrol boats, 15 Ghadir-type coastal craft, 9 amphibious hulls including 6 Karbala and 3 Hengam, hovercraft such as SR.N6 and BH.7, and one dedicated mine-warfare vessel plus a recognised mining capability.
🇺🇸 United StatesOnly 4 ageing Avenger-class mine countermeasures ships; littoral work falls to Independence and Freedom corvettes and helicopter- and unmanned-system-based sweeping, a comparatively thin dedicated inventory.
Bases & reach
Edge: United States
🇮🇷 IranEight bases, all national and concentrated on the Gulf, Hormuz approaches and Gulf of Oman — Bandar Abbas, Bushehr, Chabahar, Jask — giving interior lines but no expeditionary footprint.
🇺🇸 United States37 bases on file spanning Guam, Yokosuka, Sasebo, Pearl Harbor, Crete and Djibouti, sustaining continuous global deployment; 3.83 million tonnes of hull and 67 ships on order underwrite persistence.
Wildcards
- Geography of Hormuz Iran's fleet operates from home ports along a narrow, mined-capable chokepoint where small craft, midget submarines and shore-based fires compress reaction times, degrading the practical value of blue-water range and sensor reach.
- Industrial depth The United States has 67 hulls on order, including 19 Arleigh Burke, 15 Virginia and 4 Gerald R. Ford; Iran records none, so attrition or maintenance backlogs are far harder for Tehran to replace.
- Access and alliances US forward basing at Yokosuka, Sasebo, Guam and Crete depends on host-nation consent; withdrawal of access would lengthen transit and sortie cycles, while Iran's shorter logistics chain is largely self-contained.
- Sustained operating tempo Nuclear propulsion, 2 support ships plus 12 auxiliaries on order and routine carrier rotations give the US Navy months-long station-keeping; Iranian patrol craft and hovercraft are limited to short sorties near their 8 bases.
Analysis generated by a language model from the figures on this page and public sources; it is an informed reading, not a military assessment or a prediction.
Frequently Asked Questions
Which country has more naval ships, Iran or United States?
United States has a larger navy with 553 ships compared to Iran's 142 ships.
Which navy has more submarines, Iran or United States?
United States operates more submarines with 85 compared to Iran's 4.
Which country has more aircraft carriers, Iran or United States?
United States has 16 aircraft carrier(s) compared to Iran's 1.
Which navy has more destroyers, Iran or United States?
United States operates 102 destroyers compared to Iran's 0.
Which navy has more frigates, Iran or United States?
Iran operates 8 frigates compared to United States's 3.
How do the Iran and United States navies compare in size?
United States's navy is 3.9 times larger than Iran's in terms of total ships (553 vs 142).