Parsonby is a hamlet in the civil parish of Plumbland, in the Cumberland district, in the ceremonial of Cumbria, England. It is located on the B5301 road, south of Aspatria.

Parsonby, is part of the Workington constituency of the UK parliament. The current Member of Parliament is Sue Hayman, a member of the Labour Party. The Labour Party has won the seat in every general election since 1979; the Conservative Party has only been elected once in Workington since the Second World War: in the 1976 Workington by-election. From 1974 to 2023 it was in Allerdale district.

The village also has its own Parish Council jointly with nearby Plumbland; Plumbland Parish Council Parish Council.

For the European Parliament residents in Parsonby voted to elect MEP's for the North West England constituency.

• Listed buildings in Plumbland