John Cadbury (1801-12 May 1889), was proprietor of a small chocolate business in Birmingham, England, that later became part of Cadbury-Schweppes, one of the world's largest chocolate producers.

Cadbury was born in Birmingham to a wealthy Quaker family that moved to the area from the west of England. As a Quaker in the early 19th century, he was not allowed to enter universities and therefore could not pursue a profession such as medicine or law. Being pacifist, a military career was also not a possibility. So, like many other Quakers of the time, he turned his energies toward business, starting an apprenticeship as a tea dealer in Leeds in 1818.

Returning to Birmingham, in 1824, Cadbury opened a small one-man grocery shop at 93 Bull Street. In 1831, he switched his business, renting a small factory (an old malthouse) in Crooked Lane to begin the manufacture of drinking chocolate and cocoa.

Cadbury was influenced in his choice of trade by his temperance beliefs – he felt alcohol was a major cause of poverty and other social ills, and saw cocoa and chocolate as alternatives. As a social reformer, he also led a campaign to ban the use of boy chimney-sweeps , and campaigned against animal cruelty, forming the Animals Friend Society , a forerunner of the Royal Society for the Prevention of Cruelty to Animals.

Meanwhile, Cadbury’s manufacturing enterprise prospered, his brother Benjamin Cadbury joined the business in 1847 and they rented a larger factory in Bridge Street. Two years later, in 1849, the Cadbury Brothers pulled out of the retail business, leaving it in the hands of their nephew, Richard Cadbury Barrow (Barrow's remained a leading Birmingham store until the 1960s).

Cadbury married twice. He and his first wife, Priscilla Ann Dymond (1799-1828), were married in 1826, but she died two years later. In 1832 he married his second wife, Candia Barrow (1805-1855). By her he had seven children: John (1834-1866), Richard (1835-1899), Maria (1838-1908), George (1839-1922), Joseph (1841-1841), Edward (1843-1866), and Henry (1845-1875).

Benjamin and John Cadbury dissolved their partnership in 1860 and John retired in 1861, leaving his sons, Richard and George to continue to build the business. In 1879, they relocated it to a small village called Bournbrook, developed and renamed Bournville by the Cadbury's, and now a major suburb of Birmingham. The family rapidly developed the Cadbury’s factory, and it remains a key site of Cadbury-Schweppes.

For the remainder of his life, John Cadbury engaged in civic and social work in Birmingham.