0 an area of eastern Wales that was a county (= area with its own local government) until 1974:
He was born in Montgomeryshire, Powys.
Pentre Nant mineral water comes direct from a spring in Montgomeryshire and has a pure and refreshing taste.
the Member of Parliament for Montgomeryshire
Montgomeryshire is the northern portion of Powys, similarly underpopulated and remote.
He was elected to the first Montgomeryshire county council in 1889.