Eugene Jerome Hainer (born August 16, 1851) was a Republican politician who represented the State of Nebraska in the United States House of Representatives during the late nineteenth century. Serving as a member of Congress from Nebraska’s 4th Congressional District, he held office as a U.S. Representative from August 7, 1893, to March 3, 1897. Over the course of his tenure, Hainer completed two terms in the House.

Hainer’s service in Congress placed him among the historical members of the U.S. House of Representatives from Nebraska during a period of national economic and political change. Identified in congressional records by the biographical guide ID H000024, he is noted specifically for his role as a Republican representative of Nebraska’s 4th District from 1893 to 1897. Further details of his life and career beyond these dates and offices are not provided in the available metadata.