This is a list of the nineteen large reflector telescopes, arranged by diameter, largest first. Telescopes constructed after 1995 have not been included.
| Telescope | Observatory | Location | Diameter | Year Established |
| Keck 1 | W. M. Keck | Mauna Kea, Hawaii, USA | 9.82 m 32.31 ft |
1991 |
| Bol’shoi Telescop Azimutal’nyi |
Special Astrophysical | Mt. Pastukhov, Russia | 6.0 m 19.74 ft |
1975 |
| George Ellery Hale | Palomar | Mt. Palomar, California, USA | 5.08 m 16.71 ft |
1948 |
| Multiple Mirror | MMT | Mt. Hopkins, Arizona, USA | 4.5 m 14.81 ft |
1979 |
| William Herschel | Roque de Los Muchachos | La Palma, Canary Islands | 4.2 m 13.82 ft |
1987 |
| 4-meter | Cerro Tololo Inter-American | Cerro Tololo, Chile | 4 m 13.16 ft |
1976 |
| Anglo-Australian | Anglo-Australian | Siding Spring, New South Wales, Australia | 3.89 m 12.8 ft |
1975 |
| Nicholas Mayall | Kitt Peak National | Kitt Peak, Arizona, USA | 3.81 12.53 ft |
1973 |
| United Kingdom Infrared | Joint Astronomy Centre | Mauna Loa, Hawaii, USA | 3.8 m 12.5 ft |
1978 |
| Canada-France-Hawaii | Canada-France-Hawaii Telescope Corporation |
Mauna Loa, Hawaii, USA | 3.58 m 11.78 ft |
1979 |
| ESO 3.6-meter | European Southern | La Silla, Chile | 3.57 m 11.75 ft |
1977 |
| 3.5-meter | Observatorio de Calar Alto | Calar Alto, Spain | 3.5 m 11.52 ft |
1984 |
| New Technology | European Southern | La Silla, Chile | 3.5 m 11.52 ft |
1989 |
| Starfire Optical Range | Kirtland | Kirtland AFB, New Mexico, USA | 3.5 m 11.52 ft |
1994 |
| Astrophysical Research Consortium 3.5-meter | Apache Point | Sunspot, New Mexico, USA | 3.5 m 11.52 ft |
1994 |
| Wisconsin-Indiana-Yale-NOAO | WIYN | Kitt Peak, Arizona, USA | 3.5 m 11.52 ft |
1994 |
| Donald Shane | Lick | Mount Hamilton, California, USA | 3.05 m 10.03 ft |
1959 |
| NASA Infrared | Mauna Kea | Mauna Kea, Hawaii, USA | 3 m 9.87 ft |
1979 |
