National Astronomical Observatory

National Astronomical Observatory may refer to:


 * National Astronomical Observatory (Chile)
 * National Astronomical Observatories of China
 * National Astronomical Observatory (Colombia), astronomical observatory in Bogotá
 * National Astronomical Observatory of Japan, in Mitaka
 * National Astronomical Observatory (Mexico), first in Mexico City; then in Tonantzintla, Puebla; now in Sierra San Pedro Mártir, Baja California
 * National Astronomical Observatory (Spain), in Madrid