Last Names Starting with O

2,781 surnames found in U.S. Census data starting with O. Sorted by Census rank.

Rank	Name	Est. Bearers	Per 100K	Rarity
#6164	Olszewski	6,315	1.88	Rare
#6179	Oberg	6,315	1.88	Rare
#6223	Osteen	6,248	1.86	Rare
#6263	Oquendo	6,214	1.85	Rare
#6284	Oquinn	6,180	1.84	Rare
#6326	Overman	6,147	1.83	Rare
#6524	Oswalt	5,912	1.76	Rare
#6607	Ohare	5,845	1.74	Rare
#6940	Orcutt	5,509	1.64	Rare
#6983	Omeara	5,475	1.63	Rare
#6993	Omara	5,441	1.62	Rare
#7048	Ousley	5,408	1.61	Rare
#7217	Oliveros	5,274	1.57	Rare
#7369	Ogletree	5,139	1.53	Rare
#7387	Oxford	5,139	1.53	Rare
#7455	Oseguera	5,106	1.52	Rare
#7492	Olea	5,072	1.51	Rare
#7561	Otten	5,005	1.49	Rare
#7572	Otte	5,005	1.49	Rare
#7585	Owings	5,005	1.49	Rare
#7585	Odum	5,005	1.49	Rare
#7629	Orange	4,938	1.47	Rare
#7694	Oxley	4,904	1.46	Rare
#7891	Ou	4,770	1.42	Rare
#7950	Olin	4,736	1.41	Rare
#8283	Obryant	4,568	1.36	Rare
#8317	Odle	4,535	1.35	Rare
#8697	Ospina	4,299	1.28	Rare
#8720	Ortez	4,299	1.28	Rare
#8780	Oleson	4,266	1.27	Rare
#8799	Ober	4,232	1.26	Rare
#8878	Oday	4,199	1.25	Rare
#8981	Ormsby	4,165	1.24	Rare
#9048	Oconner	4,098	1.22	Rare
#9081	Oceguera	4,098	1.22	Rare
#9232	Oney	4,031	1.20	Rare
#9320	Oyler	3,964	1.18	Rare
#9343	Ostrom	3,964	1.18	Rare
#9510	Ogilvie	3,896	1.16	Rare
#9551	Obando	3,863	1.15	Rare
#9667	Oliveri	3,829	1.14	Rare
#9839	Olivieri	3,728	1.11	Rare
#9839	Ohalloran	3,728	1.11	Rare
#9859	Oboyle	3,728	1.11	Rare
#9919	Osterman	3,695	1.10	Rare
#9932	Olney	3,695	1.10	Rare
#9940	Oshaughnessy	3,695	1.10	Rare
#10041	Orlowski	3,661	1.09	Rare
#10064	Obrian	3,661	1.09	Rare
#10079	Oman	3,628	1.08	Rare