| Acrisure Stadium | Pittsburgh | 65,500 seats | August 18, 2001 |
| Adventist Health Arena | Stockton | 11,800 seats | December 2, 2005 |
| Al Lang Stadium | St. Petersburg | 7,227 seats | 1947 |
| Al Lopez Field | — | — | March 1955 |
| Alamodome | — | 59,000 seats | 1993 |
| Alaska Airlines Center | Alaska | 5,600 seats | 2014 |
| Albany Civic Center | Georgia | 10,711 seats | 1983 |
| Alejandro Villanueva Stadium | La Victoria | 33,938 seats | — |
| Allegacy Federal Credit Union Stadium | Winston-Salem | 31,500 seats | September 14, 1968 |
| Allegiant Stadium | Clark County | 65,000 seats | July 31, 2020 |
| Allianz Field | Saint Paul | 19,400 seats | April 13, 2019 |
| Allstate Arena | Illinois | 18,500 seats | May 11, 1980 |
| Aloha Stadium | Halawa | 50,000 seats | September 12, 1975 |
| Alumni Arena (Armstrong Atlantic State University) | Georgia | 3,000 seats | 1995 |
| Amerant Bank Arena | Sunrise | 20,737 seats | October 3, 1998 |
| America First Field | Sandy | 20,213 seats | 2008 |
| American Family Fields of Phoenix | Phoenix | 7,000 seats | January 1998 |
| American League Park | Washington, D.C. | — | 1901 |
| Amway Arena | Orlando | 15,077 seats | January 29, 1989 |
| Anderson High School Wigwam | Anderson | 8,996 seats | November 1961 |
| Angel Stadium of Anaheim | Anaheim | 43,250 seats | April 19, 1966 |
| ARCO Arena | Sacramento | 16,517 seats | November 8, 1988 |
| ARCO Arena I | Sacramento | 10,333 seats | 1985 |
| Arena della Pace | Martina Franca | — | — |
| Arena Filippo Raciti | Montefiore Conca | — | — |
| Arequipa Stadium | Arequipa | 40,370 seats | — |
| Arrowhead Stadium | Kansas City | 79,101 seats | August 12, 1972 |
| Astrodome | Houston | 62,439 seats | April 9, 1965 |
| Atlanta-Fulton County Stadium | Atlanta | 52,007 seats | April 9, 1965 |
| Audi Field | Washington, D.C. | 24,000 seats | July 9, 2018 |
| Auditorium Scavolini | Pesaro | 1,170 seats | February 29, 2024 |
| Augusta Civic Center | Maine | 6,777 seats | 1973 |