California State Polytechnic University Pomona (Cal Poly Pomona) is a public polytechnic research university in Pomona, California, United States. It is the largest of the three polytechnic universities in the California State University system by enrollment.

Cal Poly Pomona began as a southern campus of the California Polytechnic School (now known as Cal Poly San Luis Obispo) in 1938, following the donation of the Voorhis School for Boys and its adjacent farm in San Dimas by Charles and Jerry Voorhis. This Pomona campus expanded in 1949 when it was gifted the W.K. Kellogg Institute of Animal Husbandry from the University of California, which was originally Will Keith Kellogg's horse ranch. Cal Poly Kellogg-Voorhis and Cal Poly San Luis Obispo continued operations under unified administrative control until 1966, when Cal Poly Pomona was formed as an independent university.

Cal Poly Pomona currently offers bachelor's degrees in 94 majors, 39 master's degree programs, 13 teaching credentials, and a doctorate across nine distinct academic colleges. The university is one among a small group of polytechnic universities in the United States which tend to be primarily devoted to the instruction of technical arts and applied sciences. Cal Poly, Pomona is a Hispanic-serving institution (HSI) and is eligible to be designated as an Asian American Native American Pacific Islander serving institution (AANAPISI).

Its sports teams are known as the Cal Poly Pomona Broncos and play in the NCAA Division II as part of the California Collegiate Athletic Association (CCAA). The Broncos sponsor 10 varsity sports and have won 14 NCAA national championships. Current and former Cal Poly Pomona athletes have won 7 Olympic medals (3 gold, 1 silver, and 3 bronze).

Let it be the Cornell of the Pacific... where any person can find instruction in any study.

Events leading to the foundation of present-day Cal Poly Pomona began with the ending of the Voorhis School for Boys near Walnut Creek in San Dimas, California, and its acquisition by the San Luis Obispo–based California Polytechnic School in 1938.

The California Polytechnic School (Cal Poly San Luis Obispo) was founded as a vocational high school when California Governor Henry Gage signed the Polytechnic School Bill on March 8, 1901, after its drafting by school founder Myron Angel. Voorhis School, on the other hand, had been established in 1928 as a private vocational school which provided elementary schooling for underprivileged boys and operated under the Christian religious principle, "education coupled with the Kingdom of God". Its founder Charles B. Voorhis and headmaster Jerry Voorhis maintained the school opened throughout the worst years of the Great Depression but persistent economic pressures forced them to transfer control to Cal Poly in San Luis Obispo in 1938.

Voorhis School became the Cal Poly-Voorhis Unit and its educational offerings were raised to the same level as Cal Poly in San Luis Obispo's, then a two-year college. The horticulture program was moved to the new satellite campus and the two units operated as one institution spanning two locations under the leadership of president Julian McPhee.