The Railroad Museum of Long Island is a railway museum based on the North Fork, of Long Island, New York, in the United States. It has 2 locations, a main location in Riverhead, and a satellite location in Greenport, west of the North Ferry to Shelter Island. Both facilities contain active model railroad displays and gift shops.
The Riverhead location of the museum is located in a former Nassau-Suffolk Lumber Company warehouse on Griffing Avenue east of the Riverhead LIRR station. It was used as a lumber yard as far back as 1885, and from 1891 to 1969 contained a turntable, water tower, and pump house. The location contains numerous rare passenger and freight cars as well as locomotives in various stages of restoration, some of which are the last of their kind. It also has a 16" gauge riding train from the 1964 World's Fair.
The Greenport is located in the former freight house of the historic Greenport Railroad Station. Throughout its history, the freight house served as a branch of the United States Post Office, Railway Express Agency, and a storage facility for LIRR Road 'n' Rail buses. Today the station contains an old wooden caboose and a snowplow, as well as artifacts and photographs and other items of LIRR history.