Leclerc, leader of the World Championship, achieved his third pole position of the year and the twelfth of his career on the last lap of the Miami International Autodrome circuit, built around Hard Rock Stadium.
The Monegasque, who has two victories (Bahrain and Australia) out of four races this year, set the best time at one minute and 28.796 seconds.
In the second starting row, the Red Bull drivers, the Dutchman Max Verstappen and the Mexican Sergio “Checo” Pérez, were located.
Behind the first four will be the Finn Valtteri Bottas (Alfa Romeo), the British Lewis Hamilton (Mercedes) and the Frenchman Pierre Gasly (AlphaTauri).
The top ten positions on the grid will be completed by Briton Lando Norris (McLaren), Japanese Yuki Tsunoda (AlphaTauri) and Canadian Lance Stroll (Aston Martin).
The Miami Grand Prix, absolute debutant on the F1 calendar and one of the two races of the year in the United States, will be held on Sunday from 4:30 p.m. in Argentina on an armed track Hard Rock Stadium, venue of the Masters 1000 of tennis and home of the Miami Dolphins of the NFL, in the Miami Gardens area.