This is an incomplete list of people who have served as Lord Lieutenant of Hertfordshire.
From 1660 the office holder was also Custos Rotulorum of Hertfordshire.
Deputy lieutenants support the work of the lord-lieutenant.
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.