He was elected to the House of Commons for County Wexford in 1820, a seat he held until 1830.
After her death in February 1828, aged 28, he married, secondly, Dorothea (Dora), daughter of Edward Pennefather, Lord Chief Justice of Ireland and Susanna Darby.
Sir Frederick Stopford was a lieutenant general in the Army and the Hon.
Lord Courtown died in November 1858, aged 64, and was succeeded in the earldom by his son from his first marriage, James.
Lady Courtown survived her husband by just over a year and died in December 1859.