| Eldagsen observatory | Springe | — |
| Elsterland Observatory | Schönewalde | — |
| Erfurt observatory | Érfurt | — |
 Erfurt public observatory | — | — |
| Eridanus Observatory | Langelsheim | — |
| Essen observatory | Essen | — |
| Experimenta observatory | Heilbronn | — |
| EXPO-Sternwarte Melle | Melle | — |
| F.Schiller-Gymnasium, observatory | Weimar | — |
| Falkensee observatory | Falkensee | — |
 Frankfurt observatory | Fráncfort del Meno | — |
 Fritz-Weithas-Sternwarte | Neumarkt in der Oberpfalz | 595 m |
| Furstenfeldbruck Magnetic Observatory | — | — |
| Gaertringen observatory | Gärtringen | — |
 Galbergweg 12 | Gotha | — |
 Galileum Solingen | Solingen | — |
 Garden observatory of Siegfried Gebhard | Dresde | — |
| Gartensternwarte Schafsweide | Elze | — |
| Gehrden observatory | Gehrden | — |
 Gelber Turm | Hildesheim | 206 m |
| Gelenau observatory | Gelenau | — |
| Geodetic Observatory Wettzell | — | — |
 Geophysical Observatory Collm | Wermsdorf | — |
| Geophysikalisches Observatorium Fürstenfeldbruck | — | — |
| Gevelsberg observatory | Breckerfeld | — |
 Glashütte Observatory | Glashütte | — |
| Gnevsdorf observatory | Buchberg | — |
| Grosshabersdorf observatory | Großhabersdorf | — |
| Guidestar Observatory | Weinheim | — |
 Göttingen Observatory | Gotinga | — |
| Hagen Observatory | Finnentrop | — |
| Hamburg observatory (before 1909) | Hamburgo | — |
| Hamburg-Georgswerder observatory | Hamburgo | — |
| Hamburg-Himmelsmoor observatory | Hamburgo | — |
| Hanau Observatory | Hanau | — |
| Hans-Haffner-Sternwarte | Hettstadt | — |
 Hans-Ludwig-Neumann-Sternwarte | Distrito del Alto Taunus | — |
 Hans-Nüchter-Sternwarte | Fulda | — |
 Heinz-Reinhardt-Sternwarte St. Ottilien | — | — |
| Heisingen Observatory | Essen | — |
 Heligoland Bird Observatory | Heligoland | — |
| Hennef observatory | Hennef | — |
| Herrenberg Observatory | Herrenberg | — |
| Herrsching observatory | Herrsching am Ammersee | — |
 Hohenpeißenberg Meteorological Observatory | Hohenpeißenberg | — |
 Hoher List Observatory | Daun | 504 m |
| Homburg-Erbach observatory | Erbach | — |
 Hondelage observatory | Brunswick | — |