James Cocks (c. 1685–1750), of Reigate, Surrey, was a British lawyer and Whig politician who sat in the House of Commons between 1707 and 1747.
He was returned again for Reigate in 1713 British general election and continued to support the Whigs, voting against the expulsion of Richard Steele on 18 March 1714.
Cocks was returned unopposed for Reigate at the 1715 British general election and voted with the Government from 1715 to 1719, when he opposed the Peerage Bill.
He acted with the Opposition during Walpole’s Administration, and made his only reported speech in 1741 in a debate on the quartering of soldiers on the civil population.
In 1745 he inherited Reigate and its electoral interest and Brookmans, Hertfordshire on the death of his aunt, Lady Jekyll.