| Casellina observatory | Scandicci | — |
| CAST Observatory | Talmassons | — |
| Castelmartini observatory | Castelmartini | — |
| Castrofilippo observatory | Castrofilippo | — |
| Cat's Eye observatory | Manciano | — |
 Catania Astrophysical Observatory | Catania | 1.735 m |
| Catania Astrophysical Observatory "A. Riccò" | Catania | — |
| Cavriana observatory | Cavriana | — |
| CCAT Trieste observatory | Trieste | — |
| Celado, observatory | Castello Tesino | — |
| Celico observatory | Celico - Centro | — |
| Cereseto Observatory | Cereseto | — |
| Cerrina Tololo Observatory | Murisengo Monferrato | — |
| Cesena Observatory | Casanova | — |
| Chions observatory | Chions | — |
| Chiusa di Pesio observatory | Chiusa di Pesio | — |
 Cidnea Astronomic Observatory | Brescia | — |
| Comeglians observatory | Údine | — |
| Como observatory | Como | — |
| Corcaroli Observatory | Malo | — |
| Cormons observatory | Cormòns | — |
| Crespadoro observatory | Crespadoro | — |
| Cupola minore est dell'Osservatorio Astronomico | Merate | — |
| Cupola minore ovest dell'Osservatorio Astronomico | Merate | — |
| Cupola principale telescopio Ruths dell'Osservatorio Astronomico | Merate | — |
| Cupola telescopio Zeiss dell'Osservatorio Astronomico | Merate | — |
| Del Celado observatory | — | — |
| Digital Stargate observatory | Manciano | — |
| Dolomites observatory | Provincia autónoma de Trento | — |
| Dridri Observatory | Dosso | — |
| Duronia Magnetic Observatory | — | — |
| East Rome Observatory | Roma | — |
| Elianto observatory | Provincia de Salerno | — |
| Eremo di Tizzano observatory | Eremo di Tizzano | — |
 Estación de la Cima Ekar | Asiago | 1.366 m |
 Estación radioastronómica de Medicina | — | — |
| Eurac observatory | Bolzano | — |
| European Gravitational Observatory | Cascina | — |
| Felliscopio Observatory | Fellicarolo | — |
| Felsina AAB observatory | Monte San Pietro | — |
 Ferdinando Caliumi astronomic observatory | Gairo | 1.150 m |
| Fiamene observatory | Verona | — |
| Filzi School observatory | Laives | — |
| Fiore Observatory | Precenicco | — |
| Foligno observatory | — | — |
| Frignano observatory | Frignano | — |
| G. C. Gloriosi Astronomical Observatory | Salerno | — |
| G. Colombo Astronomical Observatory | Padua | — |