Which of the following officers is NOT required to be elected in each Georgia county?

In Georgia, the role of the governor is a statewide position and is thus not required to be elected in each individual county. The governor is elected by citizens across the entire state during elections that occur every four years.

In contrast, positions such as tax commissioner, judge of the probate court, and sheriff are specifically mandated to be elected at the county level. Each county in Georgia has distinct responsibilities and governance, which necessitates having these officials to manage local administrative functions like taxes, probate matters, and law enforcement.

Therefore, while the governor oversees state-wide administration and policy, the other roles mentioned are essential for the local government structure, making the county-level positions a requirement in each county, unlike the position of governor.