Charles James Blomfield (29 May 1786 – 5 August 1857) was a distinguished British theologian and served as a bishop in the Church of England for 32 years.

Blomfield was born in Bury St Edmunds, Suffolk, and received his education at the local grammar school and Trinity College, Cambridge. There, he earned the Browne medals for Latin and Greek odes and the Craven scholarship. In 1808, he graduated as third wrangler and first medallist, and the next year, he secured a fellowship at Trinity College. At Cambridge, his mentor was John Hudson, a mathematician and clergyman.

In 1819, Blomfield was appointed to the affluent parish of St Botolph, Bishopsgate, and in 1822, he ascended to the role of archdeacon of Colchester. By 1824, he was consecrated as the bishop of Chester, where he implemented numerous vital reforms.

In 1828, Blomfield was named a Privy Counsellor and became the bishop of London, a position he held for twenty-eight years. His vigorous efforts significantly expanded the church's influence. Renowned as an adept debater in the House of Lords, he played a pivotal role in church reform, which led to the establishment of the ecclesiastical commission, and greatly contributed to the growth of the colonial episcopate. His warm and affable disposition proved essential in resolving disputes related to the Tractarian movement.

Ultimately, his health declined, and in 1856, he was allowed to retire from his bishopric, maintaining Fulham Palace as his residence, with an annual pension of £6000.