| Office: | Miami-Dade County Clerk of Courts |
| Termstart: | June 9, 2023 |
| Preceded: | Harvey Ruvin |
| State House1: | Florida |
| State1: | Florida |
| District1: | 118th |
| Term Start1: | November 6, 2018 |
| Term End1: | June 11, 2023 |
| Preceded1: | Jeanette Nuñez |
| Succeeded1: | Mike Redondo |
| Party: | Republican |
| Birth Name: | Juan Alfonso Fernandez-Barquin |
| Birth Date: | 6 March 1983 |
| Birth Place: | Miami, Florida, U.S. |
| Education: | Florida International University (BA) American University Washington College of Law (JD) |
Juan Alfonso Fernandez-Barquin (born March 6, 1983) is an American attorney and politician who has served as clerk of the courts of Miami-Dade County since his appointment in June 2023. He previously served in the Florida House of Representatives from 2018 until his appointment as clerk, representing parts of southwest Miami-Dade County.
Fernandez-Barquin defeated three opponents in the August 28, 2018, Republican primary, winning 44.2% of the vote.[1] In the November 6, 2018, general election, Fernandez-Barquin won 53.09% of the vote, defeating Democrat Heath Rassner and a third candidate.[2]
He was reelected to the House in 2020 and 2022.
On June 9, 2023, Governor Ron DeSantis appointed Fernandez-Barquin clerk of the courts of Miami-Dade County, following the prior clerk's death.[3] He resigned from the House on June 11.[4]