Bruce Chubb is an American model railroader, and a retired electrical engineer. Since the 1940s, he has been creating layouts called the Sunset Valley Lines. The first Sunset Valley was a Lionel tinplate layout on a tabletop. In 1954, he started work on a basement-filling freelance railroad in an ambiguous geographic setting. Set in 1950, the HO scale railroad theoretically interchanged with Frank Ellison's Delta Lines, Whit Towers' Alturas & Lone Pine, and Ned Browne's Durand & Irish Grove. It was for this layout that Chubb developed, in the 1980s, the C/MRI (Computer Model Railroad Interface), one of the first applications of digital electronics in model railroading. In the 1990s, Dr. Chubb began a new Sunset Valley, the Sunset Valley Oregon System, a 55 foot by 60 foot multi-deck layout set in the Pacific Northwest. Sunset Valley has been extensively aired over the years in Model Railroader magazine, and was the subject of three feature articles in the March 2007 issue of Scale Rails, two by Bruce himself, and one by his wife of over half a century, Janet Chubb (herself a skilled model railroader).

Chubb is also the author of How To Operate Your Model Railroad.