| Ventilla observatory | España | Madrid | — |
 Ventspils International Radio Astronomy Center | Letonia | — | — |
| Venus Hill | Estados Unidos | Charlotte Amalie | — |
 VERITAS | Estados Unidos | Arizona | 1.268 m |
| Vermilion River Observatory | Estados Unidos | Illinois | — |
| Vermillion Cliffs observatory | Estados Unidos | Kanab | — |
| Vernensky Observatory | Unión Soviética | Alma Ata | — |
| Vernonia Peak Observatory | Estados Unidos | — | — |
 Very Large Telescope | Chile | Región de Antofagasta | 2.636 m |
| Vesqueville observatory | Bélgica | Vesqueville | — |
| VHS-VISTA observatory | Chile | Región de Antofagasta | — |
| Via Capote Sky observatory | Estados Unidos | Thousand Oaks | — |
| Via Lactea observatory | España | Ager | — |
| Vicksburg observatory | Estados Unidos | Vicksburg | — |
| Victoria Experimental Network Under the Sea | Canadá | Columbia Británica | — |
| Victoria Magnetic Observatory | Canadá | Metchosin | — |
| Vienna observatory (before 1879) | Austria | Viena | — |
| Vihorlat Observatory | Eslovaquia | Humenné | — |
| Villa Remedios Geomagnetic Observatory | Bolivia | La Paz | 3.950 m |
| Village-neuf Observatory | Francia | Gare de Neuf-Brisach Ville | — |
| Vilnius observatory (since 1939) | Lituania | Vilna | — |
| Vina del Mar observatory | Chile | Viña del Mar | — |
| Vinyols observatory | España | Viñols y Archs | — |
| Violau observatory | Alemania | Altenmünster | — |
 Virgo | Italia | Santo Stefano a Macerata | — |
| Virgo Oservatory | Italia | Séveso | — |
| Virtual Observatory India | India | Pune | — |
| Visnjan Observatory | Croacia | Stotra | — |
 Vitebsk Observatory | Bielorrusia | Zachodniki | 180 m |
 Vlašim Observatory | República Checa | — | — |
 Vogelwarte Hiddensee | Alemania | Hiddensee | — |
| Vojtěch Šafařík's observatory | República Checa | Praga | — |
| Volcano Research Center | Japón | — | — |
| Volcanological and Seismological Observatory of Guadeloupe | Francia | Gourbeyre | — |
| Volcanological Observatory of the University of Colima | México | — | — |
| Volcanological Survey of Indonesia | Indonesia | Bandung | — |
 Volkssternwarte Bonn | Alemania | Stadtbezirk Bonn | 64 m |
 Volkssternwarte Buchloe | Alemania | Buchloe | 636 m |
| Volkssternwarte Dhaun observatory | Alemania | Kirn | — |
 Volkssternwarte Ennepetal | Alemania | Ennepetal | 335 m |
 Volkssternwarte Hagen | Alemania | Hagen | 300 m |
 Volkssternwarte Hannover | Alemania | Linden-Limmer | 89 m |
 Volkssternwarte Kempten | Alemania | Kempten | 725 m |
 Volkssternwarte Klagenfurt | Austria | Klagenfurt | — |
 Volkssternwarte Köln | Alemania | Sülz | 54 m |
 Volkssternwarte Michelbach | Austria | Michelbach | 570 m |
| Volkssternwarte Paderborn | Alemania | Paderborn | 119 m |
 Volkssternwarte Rothwesten | Alemania | Fuldatal | 301 m |