| Ōnogi Hidejirō | |
| Native Name Lang: | ja |
| Office: | Member of the House of Councillors |
| Term Start: | 1947 |
| Term End: | 1965 |
| Predecessor: | Akiko Kurabayashi |
| Successor: | Yukio Hayashida |
| Constituency: | Kyoto |
| Office1: | Minister of State |
| Term Start1: | September 2, 1952 |
| Term End1: | December 10, 1954 |
| Primeminister1: | Shigeru Yoshida |
| Birth Date: | 25 November 1895 |
| Birth Place: | Yamashina-ku, Kyoto, Japan |
| Party: | Liberal Party (successor to LDP) |
| Alma Mater: | Ritsumeikan University |
was a politician of the Liberal Party, representing Kyoto in the House of Councillors for four consecutive terms.
Born in Yamashina (now Yamashina Ward), Higashiyama Ward, Kyoto in 1895, he attended the Ritsumeikan University Economics Department but left before graduating to serve as president of .
He was elected to the House of Councillors in 1946, a seat he won four times. During his tenure as a councilor, Ōnogi served as Deputy Agent to the signing of the Treaty of San Francisco, Chairman of the LDP in the House of Councillors, the first President of the LDP (Kyoto Branch), and Minister of State in the 3rd, 4th and 5th Yoshida cabinets.
Ōnogi's private residence, a State Guest House built to entertain foreign dignitaries is now a wedding venue and French restaurant, managed by the Ōnogi family in the Yamashina Ward of Kyoto.
Ōnogi served as Chairman of the Kyoto Chamber of Commerce and Industry and was active directing a number of shrines and temples, such as Kurama-dera, Chion-in, Myōshin-ji and Sennyū-ji. He was active in the education industry, serving as Director of Ritsumeikan University, Kyoto Pharmaceutical University and Kyoto University of Foreign Studies.