John Frederick Eales (19 January 1881 – 6 August 1936) was a British lawyer and Conservative Party politician who served as a Member of Parliament (MP) from 1931 to 1936.^[1]

He was born in Manchester, and was the son of William Eales of Luton. He served "articles" in a Luton solicitor's office, becoming a solicitor himself in 1904.^[1] He became a partner in a law firm in Coventry in the following year.

He married Emily Randall of Luton in the same year; the couple had two daughters.^[1] In 1910, he was called to the bar at the Middle Temple, and practiced on the Midland Circuit, with his Chambers in Birmingham.^[1] As his practice grew, he moved to London in 1921. In 1928, he was appointed Recorder of Coventry and in 1934 Recorder of Nottingham. In 1929, he "took silk" to become a king's counsel.^[1]

Eales was an active member of the Conservative Party, and had been involved in the party's campaigns in the Coventry and Nuneaton constituencies in the 1920s.^[1] He was nominated to contest the 1931 general election at Birmingham Erdington.^[2] The seat had been lost by the Conservatives in 1929, when C J Simmons of the Labour Party had been elected. Eales benefitted from a large swing against Labour, and regained the seat with a majority of nearly 19,000 votes.^[3] At the next election four years later, he successfully defended the seat.^[4][5]

Eales died suddenly from a heart attack while on holiday in Whitby, Yorkshire on 6 August 1936, aged 55.^[1]