Caddo Parish is a parish located in the northwest corner of the U.S. state of Louisiana. According to the 2020 U.S. census, the parish had a po…Caddo Parish is a parish located in the northwest corner of the U.S. state of Louisiana. According to the 2020 U.S. census, the parish had a population of 237,848. The parish seat is Shreveport, which developed along the Red River.