John Ratcliffe Cousins (1863-12 March 1928) was a barrister and local politician.
The son of Edward Ratcliffe Cousins, a surgeon, he was educated at Cambridge and London Universities. Called to the bar in 1887, he was a Moderate Party member of the London County Council elected at a by-election 29 May 1899 and re-elected 1901, representing Camberwell (Dulwich). He stood down from the coounty council at the March 1904 elections.
When the Tariff Reform League was formed in 1906, Cousins was one of its organisers. In 1917 he was appointed Stipendiary Magistrate for the County Borough of West Ham, and in 1922 made a Metropolitan Police Magistrate. He sat at Greenwich and Woolwich until 1925 when he moved to the West London Police Court.
In November 1927 he was injured in a motor accident, dying from his injuries in a nursing home in March of the following year.
Some information here 
- "London Magistrate's Death". Dundee Evening Telegraph. 12 March 1928.
- "West London Magistrate". Yorkshire Post. 13 March 1928.