Ondřejov may refer to places in the Czech Republic:
Ondřejov (Pelhřimov District), a municipality and village in the Vysočina Region Ondřejov (Prague-East District), a municipality and village in the Central Bohemian Region Ondřejov Observatory, an observatory in the municipality Ondřejov, a village and part of Perštejn in the Ústí nad Labem Region Ondřejov, a village and part of Pláně in the Plzeň Region Ondřejov, a village and part of Rýmařov in the Moravian-Silesian Region