Hacıosmanoğlu is a neighborhood in Polatlı District, in Ankara Province, Türkiye. Hacıosmanoğlu lies at 825 m above sea level, 12.5 km from the Sivrihisar Dağları mountains. It has 220 inhabitants. The nearest city is Şehitlik, 52 km to the north. Among the landmarks around are Pessinus (39 km) and Gordion (57 km).