By the late 17th century, the electorate of the three seats comprised the resident freemen of Monmouth, Newport and Usk, and after the Great Reform Act of 1832 the constituency was generally referred to as the Monmouth Boroughs.
Pada akhir abad ke-17, elektorat ketiga kursi tersebut terdiri dari penduduk bebas Monmouth, Newport dan Usk, dan setelah Undang-Undang Reformasi Besar 1832 konstituensi yang dibentuk bernama Monmouth Boroughs.