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

Geography
Lake Eliza is in western Porter County, surrounding the natural lake of the same name. It is  north of Hebron, the same distance southwest of Valparaiso, the Porter county seat, and  southeast of Gary.

According to the U.S. Census Bureau, the Lake Eliza CDP has an area of , of which  are land and , or 12.52%, are water. The lake outlet is at its south end, flowing into Wolf Creek, part of the Kankakee River watershed leading to the Illinois River.

References

Census-designated places in Indiana
Census-designated places in Porter County, Indiana