| Joseph C. Johnston | |
| Office: | Member of the Iowa House of Representatives |
| Term Start: | 1969 |
| Term End: | 1973 |
| Birth Date: | 26 October 1938 |
| Birth Place: | Waterloo, Iowa, United States |
| Party: | Democratic |
| Occupation: | lawyer |
| Spouse: | Judy Johnston (1957–?), Amanda Potterfield (1983–2015) |
| Children: | 5 |
| Alma Mater: | University of Iowa |
Joseph C. Johnston (October 26, 1938 – September 19, 2015) was an American politician in the state of Iowa.
Joe Johnston was born in Waterloo, Iowa. He was a lawyer. He served in the Iowa House of Representatives from 1969 to 1973 as a Democrat.[1] He was the Democratic nominee for U.S. Congress from Iowa's Third District, running unsuccessfully against Republican incumbent Cooper Evans.[2] Following his death, the Iowa House of Representatives passed a resolution "in appreciation of his service."[3]