Seijo is a surname and a given name; notable people called Seijo include:
Surname: Bibiana Campos Seijo, editor, publisher, and media executive Francisco Zayas Seijo (born 1951), former member of the Puerto Rico House of Representatives Jorge Seijo (born 1942), radio and television personality Luisa Seijo (born 1950), Puerto Rican academic, activist, and social worker
Given name: Seijo Inagawa (1914–2007), Japanese yakuza boss, founder of the Inagawa-kai José Seijo Rubio (born 1881), Spanish painter, exponent of the post-impressionist movement
See also Seijo, Tokyo Seijo Gakuen Education Institute, educational institute that operates universities and schools in Japan Seijo Gakuen Junior High School and High School, private junior high and high school in Setagaya, Tokyo Lycée Seijo, Japanese boarding high school in Alsace region of France, near Colmar Seijo gakuen mae, railway station on the Odakyu Odawara Line in Setagaya, Tokyo, Japan Seijo University, private university in Seijo, Setagaya-ku, Tokyo, Japan Saijō (disambiguation) Seiji Siejo