Kitasōma (北相馬郡 Kitasōma-gun) is a district located in Ibaraki Prefecture, Japan.
As of March 1, 2005, the district has a population of 18,734. The total area is 24.90 km².
Currently, the district has only one town left.
- July 22, 1878 - The district was founded when Souma District in Kazusa Province split into Kitasouma District in Ibaraki Prefecture and Minamisōma District in Chiba Prefecture.
- March 13, 1947 - The village of Ino merged into the town of Toride.
- March 20, 1954 - The villages of Kawaharashiro and Kitabunkan were merged into the town of Ryūgasaki in Inashiki District. The town gained city status at the same time.
- March 21, 1954 - The parts of the village of Takasu merged into the city of Ryūgasaki.
- July 10, 1954 - The village of Sakate merged into the town of Mitsukaido in Yūki District. The town gained city status at the same time.
- January 1, 1955 - The town of Fukawa and the villages of Bunkan, Mon, and Higashibunkan merged to form the town of Tone.
- February 21, 1955
- The town of Souma and the villages of Rokugo, Sano, and parts of Takasu merged to form the town of Fujishiro.
- The remaining parts of Takasu was merged into the city of Ryūgasaki.
- March 1, 1955
- The town of Moriya and the villages of Takano, Ohno, and Oizawa merged to form the town of Moriya.
- The village of Kokinu merged with the villages of Tanihara, Towa, and Fukuoka from Tsukuba District to form the town of Yawara.
- April 1, 1956 - The villages of Uchimoriya and Kano were merged into the city of Mitsukaidō.
- October 1, 1970 - The town of Toride gained city status.
- February 2, 2002 - The town of Moriya gained city status.
- March 28, 2005 - The town of Fujishiro merged into the expanded city of Toride.
Coordinates: 35°52′06″N 140°09′54″E / 35.8682°N 140.165°E