Last Names That Start With O
407 surnames with at least 1,000 people, 2010 Census
Ortiz is the most common surname starting with O, held by 286,899 people in the 2010 Census. The list ranks the 407 surnames starting with O that at least 1,000 people had. To find a rarer surname, use the search on the surnames page.
| # | Surname | People | US rank |
|---|---|---|---|
| 1 | Ortiz | 286,899 | #68 |
| 2 | Owens | 182,719 | #140 |
| 3 | Olson | 164,035 | #157 |
| 4 | Ortega | 127,256 | #239 |
| 5 | Obrien | 118,557 | #258 |
| 6 | Oliver | 115,900 | #264 |
| 7 | Ochoa | 78,677 | #408 |
| 8 | Oconnor | 77,923 | #417 |
| 9 | Osborne | 66,827 | #502 |
| 10 | Orozco | 65,904 | #512 |
| 11 | Owen | 61,630 | #543 |
| 12 | Olsen | 59,356 | #566 |
| 13 | Oneill | 50,028 | #689 |
| 14 | Oneal | 47,979 | #729 |
| 15 | Orr | 44,388 | #774 |
| 16 | Odonnell | 43,460 | #795 |
| 17 | Oconnell | 36,194 | #961 |
| 18 | Odom | 35,020 | #996 |
| 19 | Osborn | 32,439 | #1,078 |
| 20 | Odell | 31,349 | #1,117 |
| 21 | Osorio | 29,482 | #1,199 |
| 22 | Oneil | 28,949 | #1,220 |
| 23 | Olvera | 27,551 | #1,275 |
| 24 | Orellana | 26,651 | #1,319 |
| 25 | Ott | 25,738 | #1,373 |
| 26 | Ocampo | 25,720 | #1,374 |
| 27 | Olivares | 23,982 | #1,490 |
| 28 | Ornelas | 22,969 | #1,568 |
| 29 | Otto | 22,558 | #1,587 |
| 30 | Oleary | 22,329 | #1,607 |
| 31 | Ojeda | 22,045 | #1,633 |
| 32 | Ohara | 21,710 | #1,660 |
| 33 | Otero | 20,937 | #1,716 |
| 34 | Olivas | 20,106 | #1,785 |
| 35 | Oliva | 19,513 | #1,835 |
| 36 | Oliveira | 19,055 | #1,887 |
| 37 | Ogden | 18,860 | #1,906 |
| 38 | Overton | 18,820 | #1,914 |
| 39 | Ordonez | 18,498 | #1,952 |
| 40 | Oh | 18,285 | #1,978 |
| 41 | Omalley | 17,588 | #2,046 |
| 42 | Oakes | 17,499 | #2,065 |
| 43 | Okeefe | 17,414 | #2,079 |
| 44 | Oakley | 17,238 | #2,099 |
| 45 | Orourke | 16,457 | #2,213 |
| 46 | Ontiveros | 16,382 | #2,225 |
| 47 | Ogle | 14,354 | #2,524 |
| 48 | Oswald | 14,322 | #2,530 |
| 49 | Ouellette | 13,984 | #2,583 |
| 50 | Oldham | 12,928 | #2,792 |
| 51 | Orlando | 12,586 | #2,865 |
| 52 | Overstreet | 12,342 | #2,907 |
| 53 | Oglesby | 12,271 | #2,919 |
| 54 | Oates | 12,202 | #2,940 |
| 55 | Oreilly | 12,074 | #2,970 |
| 56 | Osullivan | 11,818 | #3,032 |
| 57 | Otoole | 10,842 | #3,309 |
| 58 | Olguin | 10,660 | #3,356 |
| 59 | Oshea | 10,531 | #3,395 |
| 60 | Olivo | 10,483 | #3,412 |
| 61 | Osman | 9,908 | #3,590 |
| 62 | Olmos | 9,895 | #3,596 |
| 63 | Olivarez | 9,720 | #3,660 |
| 64 | Ong | 9,584 | #3,704 |
| 65 | Ostrander | 9,518 | #3,722 |
| 66 | Ocasio | 9,293 | #3,815 |
| 67 | Olivera | 9,108 | #3,896 |
| 68 | Outlaw | 8,901 | #3,991 |
| 69 | Orosco | 8,313 | #4,273 |
| 70 | Oden | 8,240 | #4,315 |
| 71 | Oviedo | 8,145 | #4,362 |
| 72 | Olmstead | 8,021 | #4,430 |
| 73 | Orta | 7,820 | #4,535 |
| 74 | Ordaz | 7,753 | #4,578 |
| 75 | Ovalle | 7,698 | #4,610 |
| 76 | Olds | 7,670 | #4,627 |
| 77 | Omar | 7,660 | #4,631 |
| 78 | Osuna | 7,601 | #4,666 |
| 79 | Osburn | 7,549 | #4,699 |
| 80 | Otis | 7,549 | #4,699 |
| 81 | Ogrady | 7,306 | #4,831 |
| 82 | Oaks | 7,182 | #4,903 |
| 83 | Oxendine | 7,139 | #4,930 |
| 84 | Oropeza | 7,082 | #4,965 |
| 85 | Ostrowski | 7,005 | #5,015 |
| 86 | Orton | 6,720 | #5,201 |
| 87 | Obryan | 6,408 | #5,433 |
| 88 | Olivier | 6,400 | #5,438 |
| 89 | Orth | 6,345 | #5,482 |
| 90 | Ozuna | 6,327 | #5,499 |
| 91 | Overby | 6,311 | #5,512 |
| 92 | Oster | 6,259 | #5,554 |
| 93 | Osgood | 6,186 | #5,619 |
| 94 | Obregon | 6,172 | #5,630 |
| 95 | Orona | 6,145 | #5,649 |
| 96 | Ochs | 5,901 | #5,853 |
| 97 | Oliphant | 5,808 | #5,931 |
| 98 | Olmedo | 5,768 | #5,967 |
| 99 | Olinger | 5,732 | #5,998 |
| 100 | Olive | 5,712 | #6,021 |