He was born 16 September 1597, the second son of Robert Carey, 1st Earl of Monmouth and Elizabeth Trevannion.
[1] When Giles Mompesson was expelled from his parliamentary seat of Great Bedwyn in 1621, he was returned at the subsequent by-election as the Court candidate despite his lack of local connections.
[4] Between 1624 and 1929 Carey was elected for Cornish constituencies through the influence of his mother's links to the local gentry.
[1] Carey married, Margaret, daughter of the Master of Requests, Thomas Smith of Abingdon, Berkshire (now Oxfordshire) & Parson's Green, Middlesex and his wife, Frances, later Countess of Exeter.
They had three daughters:[5] After Carey died, Margaret married Sir Edward Herbert.