Shōnan, shounan, or shonan may refer to:

• Shonan Fujisawa Campus, a research-oriented campus of Keio University located in the city of Fujisawa, Kanagawa Prefecture, Japan
  • Keio Shonan-Fujisawa Junior and Senior High School, a junior and senior high school in Fujisawa, Kanagawa Prefecture, Japan
• Shonan Institute of Technology, a private university in Fujisawa, Kanagawa, Japan
  • Shonan Institute of Technology High School, a high school in Kanagawa, Japan
• Shonan Junior College, a private junior college in Yokosuka, Kanagawa Prefecture, Japan
• Shonan Junior College of Technology, a private junior college in Yokohama, Japan

• Shōnan, a region along the coast of Sagami Bay in Kanagawa Prefecture, Japan
• Shōnan, Chiba, a town in Higashikatsushika District, Chiba Prefecture, Japan
• Shōnan, the name of Singapore during the Japanese occupation

• Yokoi Shōnan (1809-1869), a Bakumatsu and early Meiji period scholar and political reformer in Japan

Shōnan is also found in the names of several sumo wrestlers from Kanagawa Prefecture:

• Shōnannoumi Momotarō (born 1998), makuuchi-ranked wrestler
• Shōnanzakura Sōta (born 1998), former jonokuchi-ranked wrestler

• Shonan Bellmare, a Japanese professional football (soccer) club
• Shonan Bellmare futsal, a Japanese professional futsal club
• Shonan BMW Stadium Hiratsuka, a multi-purpose stadium in Hiratsuka, Kanagawa, Japan

• Shōnan (train), a commuter railway service on the Tōkaidō Main Line operated by JR East in Japan
• Shonan Monorail, a suspended monorail in Kamakura and Fujisawa, Kanagawa Prefecture, Japan
• Shōnan Station, a railway station on the Saitama New Urban Transit New Shuttle in Ageo, Saitama, Japan
• Shōnan-Enoshima Station, a monorail train station on the Shōnan Monorail in Fujisawa, Kanagawa Prefecture, Japan
• Shōnan-Fukasawa Station, a monorail train station on the Shōnan Monorail in Kamakura, Kanagawa Prefecture, Japan
• Shōnan-Machiya Station, a monorail train station on the Shōnan Monorail in Kamakura, Kanagawa Prefecture, Japan
• Shōnan–Shinjuku Line, a passenger railway service in Japan
• Shinshōnan Bypass, a 4-laned toll road in Kanagawa Prefecture, Japan

• MV Shōnan Maru 2, a Japanese security vessel operated by the Japanese Fisheries Agency
• Shonan Beach FM, a radio station in Kanagawa Prefecture, Japan
• Shonan Gold, a hybrid Japanese citrus
• Shonan Junai Gumi, a manga by Tohru Fujisawa
  • GTO: 14 Days in Shonan, a spinoff of the sequel to Shonan Junai Gumi
• Shōnan no Kaze, a Japanese four member reggae band

• Shōnen (disambiguation)