 Volkssternwarte Singen | Alemania | Singen | 429 m |
 Volkssternwarte Urania Jena | Alemania | Jena | 345 m |
 Volkssternwarte Wetterau | Alemania | Bad Nauheim | 265 m |
 Volkssternwarte Würzburg | Alemania | Wurzburgo | 268 m |
 Volkssterrenwacht Copernicus | Países Bajos | Bloemendaal | — |
| Volkssterrenwacht Simon Stevin | Países Bajos | Halderberge | — |
| Vostok Magnetic Observatory | — | — | — |
| Vulcan North, Lick observatory | Estados Unidos | Mount Hamilton (California) | — |
| Vulpecula observatory | Hungría | Budapest | — |
| Vyškov observatory | República Checa | Vyškov | 245 m |
| W Crusis Astronomical Observatory | Argentina | San Justo | — |
| Waizenreuth Observatory | Alemania | Weidenberg | — |
| Wakayama observatory | Japón | Wakayama | — |
| Wallace Observatory | Estados Unidos | Westford | — |
| Wallaroo observatory | Australia | Macropus robustus | — |
| Wallhausen Observatory | Alemania | Wallhausen | — |
| Wallis Observatory | Estados Unidos | California | — |
| Walney Bird Observatory | Reino Unido | — | — |
| Walnut Creek observatory | Estados Unidos | Walnut Creek | — |
 Walter-Hohmann-Sternwarte | Alemania | Hardheim | 385 m |
 Walter-Hohmann-Sternwarte | Alemania | Essen | 120 m |
| Waltonfields Observatory | Estados Unidos | Walton | — |
| Wanapum Dam observatory | Estados Unidos | Washington | — |
| Wanniassa observatory | Australia | Wanniassa | — |
 Ward Observatory | Nueva Zelanda | Manawatu-Wanganui | — |
| Warner and Swasey Nassau Station | Estados Unidos | Chardon | — |
| Warner Observatory | Estados Unidos | Rochester | — |
| Warren & Beverly Observatory | Estados Unidos | Cloudcroft | — |
| Warren Rupp Observatory | Estados Unidos | Ohio | — |
| Warrumbungle Observatory | Australia | Coonabarabran | — |
 Warsaw University Astronomical Observatory | Polonia | Warszawa-Śródmieście | — |
| Wartburg College Observatory | Estados Unidos | Waverly | — |
 Wasserturm | Alemania | Demmin | 15 m |
| Wast Hills Observatory | Reino Unido | — | — |
| Waterfall Education Park - Planetarium and Observatory | Turquía | Provincia de Estambul | — |
| Waterlooville observatory | Reino Unido | Waterlooville | — |
| Wayside Observatory | Estados Unidos | Minnetonka | — |
| Weaver Student Observatory | Estados Unidos | California | — |
| Wegberg observatory | Alemania | Wegberg | — |
| Weinheim observatory | Alemania | Weinheim | — |
| Weitkamp Observatory | Estados Unidos | Ohio | — |
| Wellinghofen observatory | Alemania | Dortmund | — |
| Wendelstein Observatory | Alemania | Múnich | — |
| Werner Schmidt Observatory | Estados Unidos | Yarmouth | — |
| Werrington observatory | Reino Unido | City of Peterborough | — |
| West Challow observatory | Reino Unido | Wantage | — |
| West Mountain Observatory | Estados Unidos | Utah | — |
| West Skies Observatory | Estados Unidos | Mulvane | — |