Lomax is a village in Henderson County, Illinois, United States.

Illinois Route 96 passes through the village, leading east 5 miles (8 km) to Illinois Route 94 north of Terre Haute and southwest 6 miles (10 km) to Dallas City along the Mississippi River.

According to the 2021 census gazetteer files, Lomax has a total area of 1.19 square miles (3.08 km2), all land.

Amtrak’s Southwest Chief, which operates between Los Angeles and Chicago, passes through the town on BNSF tracks, but makes no stop.

The California Zephyr has a stop located in Burlington, which is 13 miles (21 km) to the north.