Milton Hay (July 3, 1817 – September 16, 1893) was an American politician and lawyer.

Hay then practiced law in Springfield, Illinois, with John M. Palmer and with Shelby Moore Cullom.

Hay served in the Illinois Constitutional Convention of 1872 and was a Republican.

His son Logan Hay also served in the Illinois General Assembly.

This article about a Member of the Illinois House of Representatives is a stub.