Springfield is the county seat of Robertson County, Tennessee, United States. It is located in Middle Tennessee near the northern border of the state. As of the 2020 census, the city's population was 18,782.

Robertson County is a county located on the central northern border of Tennessee in the United States. As of the 2020 United States Census, the population was 72,803 people. Its county seat is Springfield. The county was named for James Robertson, an explorer, founder of Nashville, and a state senator, who was often called the "Father of Middle Tennessee." Robertson County is a component of the Nashville-Davidson–Murfreesboro–Franklin, TN Metropolitan Statistical Area.