Sidney Carroll Miller is an American politician from Stephenville, Texas. He is the Texas Agriculture Commissioner, serving since January 2015. He is a Republican.

The Texas Department of Agriculture (TDA) is a state agency within the state of Texas, which is responsible for matters pertaining to agriculture, rural community affairs, and related matters. It is currently headed by Agriculture Commissioner Sid Miller, a Republican, who was reelected to a 3rd term in 2022.