| John G. Ziegler | |
| Birth Date: | 21 August 1909 |
| Death Place: | Scottsdale, Arizona |
| Nationality: | American |
| Field: | Control theory |
John G. Ziegler (August 21, 1909 – December 9, 1997) was an American control engineer who made significant contributions to the field of control theory. He is well known for his research paper on Ziegler-Nichols method, co-authored with Nathaniel B. Nichols.[1]