John Southerden Burn (1799?–1870) was an English solicitor and antiquary.
Born in 1798 or 1799, qualified as a solicitor in 1819, when he began to practise at 11 Staples Inn, Holborn in London. In 1820 he moved to 11 King's Bench Walk, Temple, and in 1822 to 27 King Street, Cheapside. In the following year he entered into a partnership with Samuel Woodgate Durrant, which lasted till 1828, when he removed to 25 Tokenhouse Yard.
In 1831 Burn was appointed registrar of marriages at chapels prior to 1754. In 1836 he became secretary to the commission for inquiring into non-parochial registers, a post which he retained until 1841. In that year he moved to 1 Copthall Court, Throgmorton Street, and entered into a partnership with Stacey Grimaldi and Henry Edward Stables, which lasted until 1847, when Grimaldi retired. In 1854 a new partner, Charles Tayler Ware, joined the firm; in the following year, after Stables's death, Burn retired from practice, and lived at The Grove in Henley. He died at The Grove, on 15 June 1870.
Professionally concerned with parish registers, he studied them. Finding that no specialist work on the area had appeared since Observations on Parochial Registers (1764) by Ralph Bigland in 1764, he published in 1829 his Registrum Ecclesiæ Parochialis, a history of parish registers in England, with observations on those in other countries. A second edition appeared in 1862. In 1831 he published, with biographical notes, the Livre des Anglois à Genève, the register of the English church in Geneva from 1554 to 1558, which had been communicated to him by Samuel Egerton Brydges.
In 1833 he published The Fleet Registers, containing a history of Fleet marriages, which reached a third edition in 1836. In 1846 he issued his major work, The History of the French, Walloon, Dutch, and other Foreign Protestant Refugees settled in England, which he compiled mainly from registers of places of worship.
In 1861 he published A History of Henley on Thames. In 1865 he produced The High Commission, dedicated to Charles George Young, which consisted of a collection of notices of the court and its procedure drawn from various sources. Early in 1870 he issued a similar but more elaborate work on The Star Chamber, which also contained some additional notes on the court of high commission.
He also edited The Marriage and Registrations Acts (6 and 7 William IV), London, 1836.
This article incorporates text from a publication now in the public domain: Sidney Lee, ed (1901). Dictionary of National Biography, 1901 supplement. London: Smith, Elder & Co.