The Steamship Historical Society of America (SSHSA) is a non-profit organization that was founded in 1935 as a means of bringing together amateur and professional maritime historians in the waning years of steamboat services in the northeastern United States.
The interests of SSHSA have since expanded to encompass engine-powered vessels throughout North America and worldwide, both inland and deep sea.
SSHSA was incorporated in the Commonwealth of Virginia in 1950 and is currently headquartered in Warwick, Rhode Island, United States.
SSHSA's quarterly illustrated journal, Steamboat Bill, has been published continuously since 1940 and is the oldest publication in its field.
[citation needed] In the 2010 the historical society updated their magazine's lay-out and title to better encompass their mission and content, renaming the publication PowerShips.