During the 20th century, Pinal was very much a bellwether county in U.S. presidential elections, having supported the winning candidate in every election between Arizona's statehood in 1912 and 2004 except for that of 1968, when Hubert Humphrey won the county by 3.2 percentage points but lost to Richard M. Nixon. As a result of the urban sprawl from Phoenix spreading into the county, a major political reversal has taken place between it and neighboring Maricopa County since the turn of the millennium. Pinal voters now trend more Republican than traditionally conservative Maricopa County, and it has become a safely Republican county. Donald Trump carried the county by the second-largest margin for a Republican since statehood.

Salaries for county elected officials are set by the Arizona Revised Statutes. All county elected officials except the Sheriff (Mark Lamb as of 2017) and the County Attorney make a salary of $63,800, along with county benefits and compulsory participation in the Arizona State Elected Official Retirement Plan.