| Harry Johnston | |
| Office: | United States Special Envoy for Sudan |
| Term Start: | August 27, 1999[1] |
| Term End: | 2000 |
| President: | Bill Clinton |
| Office1: | Member of the U.S. House of Representatives from Florida |
| Term Start1: | January 3, 1989 |
| Term End1: | January 3, 1997 |
| Predecessor1: | Daniel A. Mica |
| Successor1: | Robert Wexler |
| Constituency1: | 14th District (1989-1993) 19th District (1993-1997) |
| Office2: | President of the Florida Senate |
| Term Start2: | November 20, 1984 |
| Term End2: | November 18, 1986 |
| Preceded2: | N. Curtis Peterson Jr. |
| Succeeded2: | John W. Vogt |
| State Senate3: | Florida |
| State3: | Florida |
| District3: | 26th |
| Term Start3: | November 19, 1974 |
| Term End3: | November 18, 1986 |
| Preceded3: | Russell Sykes[2] |
| Succeeded3: | Eleanor Weinstock[3] |
| Birth Name: | Harry Allison Johnston II |
| Birth Date: | 2 December 1931 |
| Birth Place: | West Palm Beach, Florida, U.S. |
| Death Place: | West Palm Beach, Florida, U.S. |
| Party: | Democratic |
| Spouse: | Mary Otley[4] |
| Children: | 2 |
| Education: | Virginia Military Institute (BA) University of Florida (JD) |
| Allegiance: |  United States |
| Rank: | First Lieutenant |
| Serviceyears: | 1953–1955 |
Harry Allison Johnston II (December 2, 1931 – June 28, 2021) was an American lawyer, politician and diplomat from Florida. He was a member of the United States House of Representatives and was a member of the Democratic Party.
Johnston was born in West Palm Beach, Florida. He attended the Virginia Military Institute, and he became a lieutenant in the United States Army after graduating. Once he was discharged, he entered the University of Florida and earned his Juris Doctor degree.
In 1974, Johnston was elected to the Florida Senate. With the Democrats in control of the body in the 1980s, Johnston rose to the rank of President of the Senate. In 1986, he sought the Democratic nomination for Governor of Florida, but lost in a close primary race.
Johnston was elected to Congress in 1988. He served four terms in the House before his retirement in 1997.
In 1999, President Bill Clinton appointed him to serve as the United States Special Envoy for Sudan, a position he held until 2000.
He was an attorney at the West Palm Beach law firm of Jones, Foster, Johnston & Stubbs, P.A., until his retirement from practicing law.
He served on the District Board of Trustees at Palm Beach State College from 1997 to 1999.
Johnston died on June 28, 2021, aged 89, more than a decade after being diagnosed with Alzheimer's disease.[5]