John Wesley Berry (1857 – August 13, 1931) was an American pioneer, businessman, and politician from Tacoma, Washington. His main business was flour and cereal production. Berry built the first oat and cereal mill of the west in Tacoma and established the Cascade Cereal Company, the second-most successful mill in the city. An experienced mechanic, Berry invented and patented the split pulley. He co-founded the Deming-Berry Company, which specialized in mechanical supplies manufacturing. Both of Berry's companies supplied their products to a number of state institutions, including schools and hospitals.