Kōki, Koki, Kouki or Kohki is a masculine Japanese given name. Notable people with the name include:

• Kōki (model) (born 2003), Japanese model
• Kohki Abe (阿部 浩己, born 1958), Japanese human rights activist
• Koki Ando, president of Nissin Food Products Co. Ltd
• Kōki Aoyagi (青柳 昴樹, born 1997), Japanese baseball player
• Koki Fukui (福井 光輝, born 1995), Japanese footballer
• Kōki Harasawa (born 1971), Japanese voice actor
• Kōki Hirota (廣󠄁田 弘毅, 1878–1948), Japanese prime minister
• Koki Ikeda (池田 向希, born 1998), Japanese racewalker
• Koki Ishii (born 1995), Japanese footballer
• Kōki Ishii (1940–2002), Japanese politician
• Kōki Kameda (born 1986), Japanese professional flyweight boxer
• Koki Kotegawa (born 1989), Japanese footballer
• Kōki Mitani (born 1961)
• Kōki Miyata (born 19??), Japanese voice actor
• Koki Mizuno (born 1985), Japanese footballer
• Koki Morita (森田 晃樹, born 2000), Japanese footballer
• Koki Nakamura (中村 宏輝, born 1992), Japanese footballer
• Kōki Naya (1940–2013), birth name of Taihō Kōki, Japanese sumo wrestler
• Koki Negi (根木 洸希, born 2000), Japanese footballer
• Koki Ogawa (disambiguation), multiple people
• Koki Saito (斉藤 光毅, born 2001), Japanese footballer
• Koki Sakamoto (born 1986), Japanese Gymnast in the 2008 Olympics
• Koki Tanaka (born 1985), member of the Japanese group KAT-TUN
• Kōki Tanaka (artist) (born 1975), Japanese artist
• Kouki Takahashi (1987–2011), Japanese motorcycle racer
• Koki Tsukagawa (塚川 孝輝, born 1994), Japanese footballer
• Koki Wakasugi (若杉 好輝, born 1995), Japanese footballer
• Koki Yamamoto (山本 幸輝, born 1990), Japanese rugby union player
• Koki Yonekura (米倉 恒貴, born 1988), Japanese footballer
• Koki Uchiyama (内山 昂輝, born 1990), Japanese voice actor