Kenjirō, Kenjiro or Kenjirou (written: 健二郎, 健次郎, 健治郎, 謙二郎, 謙次郎, 建次郎, 賢二郎 or 乾二郎) is a masculine Japanese given name. Notable people with the name include:
Den Kenjirō (田 健治郎) (1855–1930), Japanese politician
Kenjiro Ezoe (江添 建次郎) (born 1982), Japanese footballer
Kenjiro Haitani (灰谷 健次郎) (1934–2006), Japanese writer
Kenjiro Hata (畑 健二郎) (born 1975), Japanese manga artist
Kenjirō Ishimaru (石丸 謙二郎) (born 1953), Japanese actor
Kenjiro Nomura (野村 謙二郎) (born 1966), Japanese baseball player
Kenjiro Okazaki (岡崎 乾二郎) (born 1955), Japanese artist
Kenjiro Shinozuka (篠塚 建次郎) (born 1948), Japanese rally driver
Kenjiro Shoda (正田 建次郎) (1902–1977), Japanese mathematician
Kenjiro Takayanagi (高柳 健次郎) (1899–1990), Japanese engineer and television pioneer
Kenjiro Todoroki (轟 賢二郎) (born 1975), Japanese yacht racer
Kenjirō Tokutomi (徳富 健次郎) (1868–1927), Japanese writer and philosopher
Kenjiro Tsuda (津田 健次郎) (born 1971), Japanese voice actor and actor
Ume Kenjirō (梅 謙次郎) (1860–1910), Japanese educator and lawyer
Yamakawa Kenjirō (山川 健次郎) (1854–1931), Japanese samurai, physicist and writer