Dayton House is a historic home located at Lima in Livingston County, New York. It was built about 1844 and expanded and upgraded in the 1850s / 1860s. It is a two story, three bay dwelling with Greek Revival form and an overlay of Italianate and Gothic Revival design elements. Also on the property is a large carriage house, smoke house, and original cast iron lamp post. It was listed on the National Register of Historic Places in 1989.