Y
| Name | Established | Location |
| Arctic Space Weather Center | Yakutsk, Russia | |
| Yale Student Observatory | New Haven, Connecticut, USA | |
| Yangbajing International Cosmic-Ray Observatory | Yangbajing Valley, Tibet, China | |
| Yantra Mandir | 1724 | New Delhi, Delhi, India |
| Yerevan Cosmic-Ray Station | Yerevan, Armenia | |
| Yerkes Observatory | 1897 | Williams Bay, Wisconsin, USA |
| York University Observatory | Toronto, Ontario, Canada | |
| Yuba City Astronomical Observatory | 2010 | Yuba City, California, USA |
| Yunnan Astronomical Observatory | 1957 | Kunming, Yunnan, China |
Read more about this topic: List Of Astronomical Observatories