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
See also List of astronomical observatories