The Lord Lieutenant of Caithness is the British monarch's personal representative in an area defined since 1975 as consisting of the local government district of Caithness, in Scotland.
[1] Previously, the area of the lieutenancy was the county of Caithness, which was abolished as a local government area by the Local Government (Scotland) Act 1973.
The district was created under the 1973 act as a district of the two-tier Highland region and abolished as a local government area under the Local Government (Scotland) Act 1994, which turned the Highland region into a unitary council area.
There can be several deputy lieutenants at any time, depending on the population of the county.
Their appointment does not terminate with the changing of the lord-lieutenant, but they usually retire at age 75.