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Observatories
observatories

15 Largest Telescopes in the U.S.

The 15 largest observatories in the United States include 10 optical telescopes, 3 radio telescopes, and 2 gravitational wave interferometers. They are mainly located atop the dry, sunny peaks of the southwest and on Mauna Kea, Hawaii.

AL AK AZ AR CA CO CT DE FL GA HI ID IL IN IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NY NC ND OH OK OR PA RI SC SD TN TX UT VT VA WA WV WI WY
      1. Telescope
      2. Size
      3. Type
      4. Location
      1. TMT (2027)
      2. 30m
      3. optical
      4. Mauna Kea, HI
      1. Keck I & II Telescopes
      2. 2x10m
      3. optical
      4. Mauna Kea, HI
      1. Large Binocular Telescope
      2. 2x8.4m
      3. optical
      4. Mt. Graham, AZ
      1. Hobby-Eberly Telescope
      2. 10m
      3. optical
      4. Fort Davis, TX
      1. Subaru Telescope
      2. 8.2m
      3. optical
      4. Mauna Kea, HI
      1. Gemini N. Telescope
      2. 8.1m
      3. optical
      4. Mauna Kea, HI
      1. MMT Observatory
      2. 6.5m
      3. optical
      4. Mt. Hopkins, AZ
      1. Hale Telescope
      2. 5.1m
      3. optical
      4. Palomar Mtn, CA
      1. Discovery Telescope
      2. 4.3m
      3. optical
      4. Mormon Lake, AZ
      1. Mayall Telescope
      2. 4m
      3. optical
      4. Kitt Peak, AZ
      1. Very Large Array
      2. 28x25m
      3. radio
      4. Socorro, NM
      1. Green Bank Telescope
      2. 100m
      3. radio
      4. Green Bank, WV
      1. Goldstone Observatory
      2. 70m
      3. radio
      4. Barstow, CA
      1. LIGO Hanford
      2. 2x4km
      3. gravitational
      4. Richland, WA
      1. LIGO Livingston
      2. 2x4km
      3. gravitational
      4. Livingston, LA