Sir Lambert Blackwell, 1st Baronet (died 1727) of Sprowston Hall, Norfolk, was an English diplomat and Whig politician who sat in the House of Commons from 1708 to 1710.
He married before February 1698 Elizabeth Herne, second daughter of Sir Joseph Herne, of London, Merchant, and his wife Elizabeth Frederick, daughter of Sir John Frederick, Lord Mayor of London from 1661 to 1662.
[2] At the 1708 British general election Blackwell was returned as Whig Member of Parliament for Wilton.
In the year 1710 to 1711, with a partner, he advanced £60,000 to the crown, and after the succession of George I he helped raise international loans.
[1] He bought extensive property in the East of Norfolk and became liable to sequestration under the 1721 South Sea Sufferers’ Act.