Hikosaburo Okonogi (小此木 彦三郎, January 26, 1928 - November 4, 1991) was a Japanese politician who served as a member of the House of Representatives from 1969 to 1991, as Minister of International Trade and Industry from 1983 to 1984, and as Minister of Construction from 1988 to 1989.

Okonogi was born in a political family in Yokohama and graduated from Waseda University with a degree in philosophy.

In 1991, Okonogi served as chairman of the House of Representatives special committee overseeing electoral reform legislation that would introduce proportional representation blocs in Japanese electoral districts.

Future Prime Minister Yoshihide Suga served as Okonogi's aide from 1975 to 1987.

His seat in the House of Representatives was thereafter assumed by his son, Hachiro Okonogi.