- Location: Melbourne, FL 2005-2009; Viera, FL 2010-2016; West Palm Beach, FL 2017-present
- League: Gulf Coast League 2005-
- Affiliation: Washington Nationals 2005-
- Ballpark: Carl Barger Baseball Complex 2005-2009; Space Coast Stadium 2010-2016; Fitteam Ballpark of the Palm Beaches (2017-present)
The Gulf Coast Nationals, also known as the GCL Nationals, are a rookie-level affiliate of the Washington Nationals. They were formed in 2005, after the Montréal Expos relocated to become the Washington Nationals; their GCL affiliate changed names, from the GCL Expos to the Nationals. The team plays in the East division of the Gulf Coast League. The Nationals play at Nationals Complex in Viera, FL.
On July 23, 2017, the GCL Nationals performed a rare feat as their pitchers tossed a seven-inning no-hitter in both ends of a doubleheader against the GCL Marlins. Joan Baez (6 innings) and Jose Jimenez (1 inning) combined for a 4-0 in the first game, and Jared Johnson (4 innings) and Gilberto Chu (3 innings) did the job in the second game, a 1-0 win.
|Year||Record||Finish||Manager||Playoffs||Hitting Coach||Pitching Coach||Coach|
|2008||33-22||3rd||Bob Henley||Lost League Finals|
|2009||36-19||2nd||Bob Henley||League Champs|
|2010||24-32||13th (t)||Bobby Williams|
|2011||20-33||14th||Bobby Williams||Michael Tejera|
|2012||27-33||11th||Tripp Keister||Michael Tejera|
|2013||49-9||1st||Patrick Anderson||League Champs||Michael Tejera|
|2014||25-35||12th (t)||Michael Barrett||Jorge Mejia||Michael Tejera||Jerad Head|
|2015||24-34||14th||Michael Barrett||Jorge Mejia||Michael Tejera||Jerad Head, Sean McCauley|
|2016||30-23||4th||Josh Johnson||Jorge Mejia||Michael Tejera|
|2017||34-22||2nd||Josh Johnson||Lost League Finals||Jorge Mejia||Michael Tejera|
|2018||23-33||15th||Mario Lisson||Jorge Mejia||Larry Pardo|
|2019||Mario Lisson||Jorge Mejia||Larry Pardo|
Nationals Team and top Hitter and Pitcher statistics
|2005||.249||4.62||.963||Francisco Guzman||154||53||.344||Matthew Perks||60.1||4-2||2.83|
|2006||.226||3.35||NA||Robert Jacobsen||193||48||.249||Oscar Lira||46||4-5||3.88|
|2007||.237||4.77||.955||Michael Burgess||128||43||.336||Randy Matias||38.1||4-1||1.64|
- Gabe Lacques: "GCL Nationals pitcher oblivious he was part of historic doubleheader no-hitter", USA Today Sports, July 23, 2017.