Septimus Norris (1818 – 1862) was an American mechanical engineer and steam locomotive designer.
He worked for the Norris firm under William's management, but did not continue under Richard's; railway historian John H. White, Jr. believes animosity existed between Septimus and Richard.
According to "The Original History of the Baldwin Locomotive Works, 1831-1923" by Paul T. Warner, as contained in "The Locomotives That Baldwin Built" by Fred Westing, the US patent for the 4-6-0 "ten wheeler" was issued to Norris in 1846, and Norris built then tested the first one in April 1847.
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