| Abarca (11,162) | Abbey (17,969) | Abbot (20,378) |
| Abbott (226,867) | Abdul (10,449) | Abel (72,124) |
| Abell (44,836) | Abercrombie (17,709) | Abernathy (59,554) |
| Abeyta (10,148) | Able (19,173) | Ables (14,422) |
| Abner (13,874) | Abney (28,764) | Abraham (78,296) |
| Abrahams (10,670) | Abrahamson (16,044) | Abram (15,460) |
| Abrams (90,139) | Abramson (16,066) | Abreu (26,132) |
| Acevedo (99,554) | Aceves (13,879) | Acker (48,934) |
| Ackerman (109,471) | Ackerson (10,816) | Ackley (31,135) |
| Ackson (76,526) | Acosta (190,408) | Acree (10,219) |
| Acton (15,781) | Acuna (25,564) | Adair (66,793) |
| Adam (57,288) | Adame (23,808) | Adams (1,852,163) |
| Adamson (56,354) | Adcock (43,104) | Addington (14,696) |
| Addis (11,866) | Addison (54,339) | Ade (12,232) |
| Adelman (11,607) | Adkins (255,747) | Adkinson (11,813) |
| Adler (66,556) | Adrian (16,074) | Agan (14,649) |
| Agee (39,357) | Agner (13,217) | Agnew (38,253) |
| Agosto (10,881) | Aguayo (18,172) | Aguiar (12,608) |
| Aguilar (326,172) | Aguilera (47,825) | Aguirre (138,482) |
| Ahearn (19,419) | Ahern (33,151) | Ahmad (23,400) |
| Ahmed (67,775) | Ahn (21,525) | Ahrens (36,724) |
| Aiello (20,636) | Aiken (49,069) | Aikens (12,719) |
| Ailey (21,293) | Ainsworth (32,999) | Aitken (12,713) |
| Aker (58,328) | Akers (79,391) | Akin (36,838) |
| Akins (53,886) | Alanis (15,772) | Alaniz (28,389) |
| Alarcon (27,761) | Alas (12,606) | Alazar (11,234) |
| Alba (21,429) | Albanese (13,027) | Albano (10,675) |
| Albaugh (10,256) | Albers (28,675) | Albert (110,046) |
| Alberto (12,787) | Alberts (19,692) | Albertson (35,528) |
| Albin (13,185) | Albrecht (61,604) | Albright (107,201) |
| Albritton (16,636) | Alcala (25,672) | Alcantar (17,431) |
| Alcantara (15,626) | Alcaraz (14,984) | Alcorn (23,575) |
| Aldana (19,959) | Alden (31,551) | Alder (12,010) |
