Browse the atlas
Asset classes
- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
- Coal / Uranium Mine5,382
- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
- LNG Terminal1,198
- Grid Storage965
- Iron Ore Mine949
- Chemical Plant868
- Interconnector704
- Export Terminal519
- Refinery279
- Storage / Tank Farm38
- Oil / Commodity Contract19
- Hydrogen Project18
- Carbon Capture (CCS)16
Chokepoints
United States · asset class
Iron Ore Mines in United States
The United States has 10 iron ore mines mapped on the OverWatts open energy atlas — the 15th-largest fleet of the 70 countries that hold any, and 1% of the world's mapped total. Of these, 7 operating and 1 under construction or proposed. The largest is US Steel Minntac Mine.
The largest owner-operators are Cleveland-Cliffs Inc (6), United States Steel Corp (3) and CalPortland Co (1) — Cleveland-Cliffs Inc alone is named on 60% of them. Half of United States's iron ore mines in service predate 1956 (median commissioning year of the 6 with a known date) and the oldest still listed is Cleveland-Cliffs Tilden Mine, dating from 1930. 1 is in the pipeline, led by Mesabi Metallics Nashwauk Mine, proposed.
On the interactive map
Largest iron ore mines in United States
Who owns United States's iron ore mines
- Cleveland-Cliffs Inc6 60%
- United States Steel Corp3 30%
- CalPortland Co1 10%
- Chippewa Capital Partners LLC1 10%
- Cleveland-Cliffs Minorca Mine Inc1 10%
- Empire Iron Mining Partnership1 10%
- Hibbing Taconite Co1 10%
- Mesabi Metallics1 10%
Counts an asset once per company named as its owner or operator; a joint venture counts for each partner.
When they were built
- 1930s2
- 1950s2
- 1960s2
Median commissioning year 1956 · oldest Cleveland-Cliffs Tilden Mine (1930) · newest US Steel Keetac Mine (1967) · 6 of 10 carry a start date
Under construction & proposed
- Mesabi Metallics Nashwauk Mine2026 · proposed
How United States compares · iron ore mines by country
- 1. India248
- 12. Iran12
- 13. Canada11
- 14. Mexico11
- 15. United States10
- 16. Sweden8
- 17. Tunisia8
- 18. Cameroon7
Frequently asked
- How many iron ore mines are there in United States?
- OverWatts maps 10 iron ore mines in United States — 1% of the world's mapped total, the 15th-largest national fleet of the 70 countries with any.
- What is the largest iron ore mine in United States?
- US Steel Minntac Mine, operated by United States Steel Corp.
- Who owns the iron ore mines in United States?
- Cleveland-Cliffs Inc is named as owner or operator on the most — 6 of 10 (60%). Next are United States Steel Corp (3), CalPortland Co (1) and Chippewa Capital Partners LLC (1).
- How old are United States's iron ore mines?
- The median commissioning year is 1956, across the 6 in service with a known start date. The oldest still listed is Cleveland-Cliffs Tilden Mine (1930).
- What new iron ore mines are being built in United States?
- 1 project is under construction or proposed. The largest is Mesabi Metallics Nashwauk Mine.