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.
A deputy lieutenant of Hertfordshire is commissioned by the Lord Lieutenant 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.