Richard Weston, 1st Earl of Portland, KG (1 March 1577 – 13 March 1634/1635), was Chancellor of the Exchequer and later Lord Treasurer of England under James I and Charles I, being one of the most influential figures in the early years of Charles I's Personal Rule and the architect of many of the policies that enabled him to rule without raising taxes through Parliament.

Upon his return to England in 1621, he was made Chancellor of the Exchequer, and retained the post after the accession of Charles I; he proved a capable financial manager but incurred popular hatred as a (justly) suspected Roman Catholic, while also later earning the enmity of the (Catholic) queen, Henrietta Maria for refusing grants to her favourites.

He opposed wars with Spain in 1623 and France in 1626, but managed to find ways of raising the money to fund them when required, even when it was impossible to secure the cooperation of Parliament.

He had three children by his first marriage, including Lady Mary Weston (2 January 1603-after August 1678), who married the 2nd Lord Aston of Forfar in 1629, and Lady Elizabeth Weston (died 1656), who married John Netterville, 2nd Viscount Netterville.

[6] His nephew (his sister's son), Jeremy Clarke, became a Governor of Rhode Island in the American colonies.