Winchcombe Henry Hartley (1740–1794) was a British politician who sat in the House of Commons between 1776 and 1794.
He inherited the estates in Berkshire and Gloucestershire of his uncle Henry Packer of Bucklebury in 1746.
The Public Ledger wrote in 1779, that he “sometimes speaks, which he had better let alone; his speeches, though not as long as those of his half-brother, are flat and empty.” In 1784 he was defeated in Berkshire.
He had joined the Whig Club shortly after his defeat in 1784 and regained the Berkshire seat in the 1790 general election, when he was returned unopposed on the interest dominated by Lord Craven.
He was appointed lieutenant-colonel commandant of the North Gloucestershire Militia (in succession to Blackwell) in 1785, and was promoted to colonel in 1793 when the regiment was embodied at the beginning of the French Revolutionary War.