First Presbyterian Church is a historic Presbyterian church at 325 Elm Street in Idaho Falls, Idaho. It was built during 1918 to 1920 and was added to the National Register in 1978. It was deemed architecturally significant as "a good example of the Neo-classical revival style"; its "dome and Ionic portico are impressive by Idaho's standards." It is the only building in Idaho designed by Uniontown, Pennsylvania ecclesiastic architect .