| John Joseph Hainkel Jr. | |
| Office: | Louisiana State Representative for Orleans Parish |
| Term Start: | 1968 |
| Term End: | 1988 |
| Preceded: | At-large delegation |
| Succeeded: | James St. Raymond |
| Office2: | Speaker of the Louisiana House of Representatives |
| Term Start2: | 1980 |
| Term End2: | 1984 |
| Preceded2: | E. L. Henry |
| Succeeded2: | John Alario |
| Office3: | Louisiana State Senator for District 6 (portions of Jefferson, Orleans, St. Tammany, and Tangipahoa parishes) |
| Term Start3: | 1988 |
| Term End3: | 2005 |
| Preceded3: | Thomas A. Casey |
| Succeeded3: | Julie Quinn |
| Office4: | President of the Louisiana State Senate |
| Term Start4: | 2000 |
| Term End4: | 2004 |
| Preceded4: | Randy Ewing |
| Succeeded4: | Donald E. Hines |
| Birth Date: | 24 March 1938 |
| Birth Place: | New Orleans, Louisiana, US |
| Death Place: | Poplarville, Mississippi |
| Spouse: | Divorced |
| Children: | 3 |
| Party: | Republican (from mid-1980s) |
| Occupation: | Attorney |
| Otherparty: | Democratic (until mid-1980s) |
John Joseph Hainkel Jr. (March 24, 1938 - April 15, 2005), was a legislator from New Orleans, Louisiana, who died in office after thirty-seven years of service. He was the first person in his state and the second in United States history to have been elected as both Speaker of his state House of Representatives and President of his state Senate.[1] [2]