Career
At the 1747 election he was returned as an Member of Parliament for Milborne Portuguese, but it was a double return and Churchill was not one of those seated. At the 1754 general election he was elected as an Member of Parliament for Great Marlow in Buckinghamshire, and held that seat until the next election, in 1761. Their daughter Mary became the second wife of Charles Cadogan, 1st Earl Cadogan, and had issue.