Lake Eliza is an unincorporated community and census-designated place (CDP) in Porter County, Indiana, United States.

It is 8 miles (13 km) north of Hebron, the same distance southwest of Valparaiso, the Porter county seat, and 17 miles (27 km) southeast of Gary.

[1] The lake outlet is at its south end, flowing into Wolf Creek, part of the Kankakee River watershed leading to the Illinois River.

The United States Census Bureau delineated Lake Eliza as a census designated place in the 2022 American Community Survey.

This Porter County, Indiana location article is a stub.