Iron Road Railways Incorporated (IRR) was a railroad holding company which owned several short line railroads in the U.S. state of Maine, as well as the Canadian provinces of Quebec, New Brunswick and Nova Scotia.
Its president was Robert T. Schmidt and officers included Benjamin F. Collins, John F. DePodesta, and Daniel Sabin.
Both Canadian National and New Brunswick Southern Railway applied to the Surface Transportation Board for permission to operate former BAR lines that served major industrial customers in northern Maine.
CN was granted permission to operate from Van Buren, Maine to Madawaska, Maine, while NBSR was granted permission to operate former BAR lines from Brownville Junction south to Searsport and north to Madawaska; neither applications became necessary after the BAR lines were sold.
The BAR, CDAC, and part of the QS/NV were sold in October 2002 to Rail World which reorganized the lines under its newly formed subsidiary Montreal, Maine & Atlantic Railway.