Szabadegyháza's history dates back to Roman times, with evidence of Roman presence found in archaeological excavations, including tomb covers, ceramic fragments, bronze fibulae, and coins.

The region was known to the Romans, intersecting the Intercisa (Dunaújváros) – Gorsium (Tác) route.

The village name, initially recorded in a donation letter on 20 November 1659, mentioned owners like Bossányi Gábor, Eölbey Márton, and Szeghy Mihály.

[1] Changing ownership over time, the village played a minor role in the 1848/49 revolution, providing provisions to the Hungarian camp.

During World War I, 215 men were called for military service, with eight casualties.