Kōnan-ku (港南区) is one of the 18 wards of the city of Yokohama in Kanagawa Prefecture, Japan. As of 2010, the ward had an estimated population of 221,536 and a density of 11,150 persons per km. The total area was 19.87 km.

Kōnan is located in eastern Kanagawa Prefecture, and south of the geographic center of the city of Yokohama.

• Minami Ward
• Isogo Ward
• Sakae Ward
• Totsuka Ward

The area around present-day Kōnan Ward was part of Kuraki District in Musashi Province until the end of the Edo period, and was tenryō territory controlled directly by the Tokugawa shogunate, but administered through various hatamoto.

After the Meiji Restoration, the area was transferred to the new Kanagawa Prefecture, and during the cadastral reform of April 1, 1889, Kamiooka village and several other villages were established. On October 1, 1927 the area was annexed by the neighboring city of Yokohama, becoming part of Naka Ward. The Shōnan Electric Railway, the predecessor to the Keikyū Main Line began operations from April 1, 1935 leading to the rapid urbanization of the area. In a major administrative reorganization of October 1, 1969, Kōnan was separated from Naka Ward, and became an independent Ward within Yokohama. The population exceeded 100,000 in ay 1970, and 200,000 in June 1984.

Kōnan Ward is largely a regional commercial center and bedroom community for central Yokohama and Tokyo.

• Keihin Electric Express Railway-Keikyū Main Line
  • Kami-Ōoka
• JR East - Negishi Line
  • Kōnandai Station
• Yokohama City Transportation Bureau – Blue Line
  • Kami-Ōoka – Kōnan-Chūō – Kaminagaya – Shimonagaya

• Route 16

College:

• Yokohama Women's Junior College

Prefectural high schools are operated by the Kanagawa Prefectural Board of Education. Prefectural senior high schools:

• Nagaya High School [ja]
• Yokohama Meihō High School [ja]
• Yokohama Nanryō High School [ja]

Municipal junior-senior high schools are operated by the Yokohama Municipal Board of Education [ja].

• Minami High School [ja] - Includes a senior high school and an attached junior high school.

Private high schools:

• Kashima Gakuen High School [ja] (Kōnandai campus)

The municipal board of education also operates public elementary and junior high schools.

Municipal junior high schools:

Former junior high schools:

• Noba (野庭) - Closed in 2020.

Elementary schools:

Additionally, Fujinoki Elementary School (藤の木小学校), Shiomidai Elementary School (汐見台小学校), and Yōkōdai-Daisan (No. 3) Elementary School (洋光台第三小学校), outside of Konan-ku, have attendance zones including parts of Konan-ku.

• Akiko Fukushima, professional golfer
• Reiko Takashima, actress
• Daisuke Sakata, professional football player
• Max Matsuura, record producer
• Kouhei Kadono, author
• Hironori Kusano, idol singer
• Jackie Sato, professional wrestler

• Kato, Yuzo. Yokohama Past and Present. Yokohama City University (1990).

• Kōnan Ward Office
• City of Yokohama statistics
• Geographic data related to Kōnan-ku, Yokohama at OpenStreetMap