Last Names Starting with O

2,684 surnames found in U.S. Census data starting with O. Sorted by Census rank.

Rank	Name	Est. Bearers	Per 100K	Rarity
#2826	Oldham	14,213	4.15	Uncommon
#2913	Oreilly	13,833	4.04	Uncommon
#2939	Orlando	13,733	4.01	Uncommon
#2941	Osullivan	13,727	4.01	Uncommon
#2985	Oglesby	13,531	3.95	Uncommon
#3062	Omar	13,113	3.83	Uncommon
#3068	Overstreet	13,097	3.82	Uncommon
#3231	Olivo	12,490	3.64	Uncommon
#3297	Otoole	12,271	3.58	Uncommon
#3350	Ong	12,027	3.51	Uncommon
#3366	Oshea	11,931	3.48	Uncommon
#3417	Oates	11,706	3.42	Uncommon
#3431	Olguin	11,669	3.40	Uncommon
#3560	Ocasio	11,208	3.27	Uncommon
#3620	Olmos	10,980	3.20	Uncommon
#3623	Olivarez	10,962	3.20	Uncommon
#3822	Olivera	10,380	3.03	Uncommon
#3825	Ostrander	10,376	3.03	Uncommon
#4030	Outlaw	9,801	2.86	Rare
#4076	Oviedo	9,692	2.83	Rare
#4382	Olmstead	8,980	2.62	Rare
#4483	Oden	8,805	2.57	Rare
#4592	Orta	8,586	2.50	Rare
#4626	Ovalle	8,528	2.49	Rare
#4635	Ordaz	8,502	2.48	Rare
#4657	Osuna	8,465	2.47	Rare
#4702	Olds	8,383	2.45	Rare
#4763	Osburn	8,252	2.41	Rare
#4789	Otis	8,211	2.40	Rare
#4834	Ogrady	8,128	2.37	Rare
#4937	Oropeza	7,930	2.31	Rare
#4946	Oaks	7,920	2.31	Rare
#4954	Orosco	7,896	2.30	Rare
#5031	Olivier	7,747	2.26	Rare
#5123	Oxendine	7,579	2.21	Rare
#5159	Ostrowski	7,513	2.19	Rare
#5220	Ozuna	7,412	2.16	Rare
#5291	Orton	7,294	2.13	Rare
#5466	Obryan	7,054	2.06	Rare
#5483	Oquendo	7,020	2.05	Rare
#5512	Orth	6,984	2.04	Rare
#5541	Obregon	6,955	2.03	Rare
#5640	Overby	6,801	1.98	Rare
#5686	Orona	6,742	1.97	Rare
#5700	Osgood	6,718	1.96	Rare
#5753	Ou	6,654	1.94	Rare
#5880	Olmedo	6,481	1.89	Rare
#5883	Ochs	6,479	1.89	Rare
#5915	Oster	6,443	1.88	Rare
#5932	Olive	6,416	1.87	Rare