Marcian Edward "Ted" Hoff Jr. (born October 28, 1937, in Rochester, New York) is one of the inventors of the microprocessor.

He applied for his first two patents based on work done for the General Railway Signal Corp. of Rochester, New York during the summers of his undergraduate study.

[3] As part of his Ph.D. dissertation, Hoff co-invented the least mean squares filter and the ADALINE neural network with Bernard Widrow.

[4] Hoff joined Intel in 1968 as employee number 12 as "manager of applications research", and is credited with coming up with the idea of using a "universal processor" rather than a variety of custom-designed circuits in the architectural idea and an instruction set formulated with Stanley Mazor in 1969 for the Intel 4004—the chip that started the microprocessor revolution in the early 1970s.

He was made a Fellow of the Computer History Museum in 2009 "for his work as part of the team that developed the Intel 4004, the world's first commercial microprocessor.