Irwin Brothers Store

Irwin Brothers Store is a historic commercial building located at Stone Mills in Jefferson County, New York. It was built in phases between 1823 and approximately 1850. It is a two story, nine bay structure constructed of locally quarried blue limestone. Also on the property is a late 19th-century carriage barn. The property was purchased in 1978 by the Northern New York Agricultural Historical Society for use as a rural museum.

It was listed on the National Register of Historic Places in 1983.