Clarence C. Caldwell (February 2, 1877 – October 4, 1957) was an American attorney and the 9th Attorney General of South Dakota.

Clarence Carey Caldwell born in Minnehaha County, Dakota Territory on February 2, 1877.^[1][2] He was raised in Minnehaha County, and graduated from Sioux Falls High School.^[1] He attended South Dakota State University and graduated in 1902 with his BA.^[1] He received his LL.B. from the University of South Dakota School of Law in 1906 after initially attending the University of Chicago Law School.^[3] Caldwell was the principal of Vermillion High School for 3 years following is graduation from the University of South Dakota.^[2]

Caldwell was state's attorney of Miner County from 1907 to 1908 and 1911 to 1914.^[1] He was elected the 9th Attorney General of South Dakota in 1914.^[1] After leaving office he established a law practice in Sioux Falls in partnership with his brother Charles V. Caldwell.^[1] Caldwell later practiced in partnership with Roy D. Burns, who went on to serve as a judge of the circuit court.^[1]

Caldwell died on October 4, 1957.^[1] He was buried at Woodlawn Cemetery in Sioux Falls, South Dakota.^[4]

In 1908, Caldwell married Marie Bryant.^[1] They were the parents of a son and a daughter.^[1]