| Ingram (241,864) | Irwin (165,748) | Iller (146,185) |
| Ibarra (108,984) | Irvin (97,023) | Inman (84,311) |
| Ivey (71,998) | Ilson (71,536) | Ireland (63,227) |
| Ing (59,706) | Irving (58,827) | Iverson (55,388) |
| Isaacs (48,725) | Isaac (46,220) | Ivy (46,136) |
| Irby (40,167) | Ingle (39,223) | Ives (39,071) |
| Ill (33,965) | Itchell (33,723) | Irvine (32,855) |
| Iles (32,527) | Ingraham (32,452) | Isbell (31,042) |
| Irizarry (30,390) | Israel (30,136) | Irish (30,035) |
| Ingalls (29,390) | Imenez (29,315) | Iaz (26,562) |
| Ingersoll (26,270) | Irons (24,964) | Isom (24,393) |
| Isaacson (23,923) | Ith (20,428) | Ibrahim (18,691) |
| Ison (17,965) | Ingham (17,688) | Ivory (16,766) |
| Iglesias (15,909) | Infante (14,854) | Izzo (14,551) |
| Isham (14,118) | Illiams (13,571) | Isenberg (13,323) |
| Islam (12,730) | Islas (12,488) | Ichardson (12,136) |
| Ios (11,968) | Isley (11,860) | Ivers (11,843) |
| Ibanez (11,546) | Iley (11,174) | Imhoff (10,937) |
| Ide (10,894) | Iniguez (10,678) | Ilva (10,547) |
| Ibson (10,394) |
| Ingram (759) | Ivey (404) | Irwin (365) |
| Inman (287) | Irvin (247) | Ireland (243) |
| Isaacs (211) | Isaac (148) | Iverson (142) |
| Ivy (142) | Isham (138) | Irby (126) |
| Irving (121) | Isbell (118) | Ingle (102) |
| Ingersoll (99) | Irvine (99) | Isom (97) |
| Ibarra (95) | Ison (94) | Ishmael (89) |
| Irizarry (88) | Ives (81) | Ingraham (76) |
| Israel (73) | Ingalls (72) | Ice (70) |
| Isaacson (69) | Irons (67) | Ivie (60) |
| Infante (59) | Imhoff (50) | Ivory (48) |
| Imlay (46) | Iglesias (45) | Ingham (39) |
| Isenberg (39) | Izzo (39) | Ince (36) |
| Ingles (36) | Ibrahim (35) | Iszard (35) |
| Imler (32) | Inks (31) | Iles (30) |
