 Astronomical observatory | Prešov | — |
| Astronomical Observatory in Kolonitskom plateau | — | — |
| Hurbanovo Magnetic Observatory | Hurbanovo | — |
| KYSUCE observatory | Kysucké Nové Mesto | — |
 Lomnický Štít Observatory | Lomnický štít | 2.632 m |
| M. R. Stefanik Observatory and Planetarium | Hlohovec | — |
 Observatorio de Modra | Modra | 531 m |
 Observatorio Skalnaté Pleso | Vysoké Tatry | 1.786 m |
 Observatory in Banská Bystrica | Banská Bystrica | — |
 Observatory of Maximilian Hell, Žiar nad Hronom | Žiar nad Hronom | 280 m |
| Partizanske observatory | Trenčín | — |
 Rožňava observatory | Rožňava | — |
 Slovak Central Observatory Hurbanovo | Hurbanovo | 115 m |
 Stara Lesna observatory | Stará Lesná | 785 m |
| Vihorlat Observatory | Humenné | — |