Belcourt Castle Newport
The Jamestown Fire Department Memorial Museum Jamestown
The Museum of Natural History & Cormack Planetarium Providence
National Museum of American Illustration Newport
The New England Wireless & Steam Museum East Greenwich
The Newport Historical Society
The Rhode Island Historical Society -- includes the Museum of Rhode Island History and the John Brown House Museum (both in Providence) and the Museum of Work & Culture in Woonsocket.
The Rhode Island School of Design Museum of Art Providence (RISD has modified their site -- hit the "museum" button on the top -- towards the right -- to reach the museum.)
South County Museum Narragansett