The O' SULLIVAN surname in the USA

Frequency Comparisons
	Total	Rank	Frequency %	Per million people
United States
United States (Current snapshot)	10,879	3054	0.004	40
United States (1880 census)	255	16104	0.001	5
Change since 1880	+10624	+13050	+0.003	+35
Other Countries
Australia	57	22868	0	3
United Kingdom	1,090	4911	0.002	24

Top States for O' SULLIVAN by Total
State	Total	Rank in State	Frequency %	Per million people
New York	2,037	763	0.011	107
Massachusetts	1,319	580	0.021	208
California	1,114	2603	0.003	33
Florida	756	2498	0.005	47
New Jersey	672	1234	0.008	80
Top States for O' SULLIVAN by Frequency
State	Total	Rank in State	Frequency %	Per million people
Massachusetts	1,319	580	0.021	208
Connecticut	386	962	0.011	113
New Hampshire	137	1320	0.011	111
New York	2,037	763	0.011	107
New Jersey	672	1234	0.008	80

Notes

Total is the total number of people with that surname.
Rank is the position in the list of names ordered by total (eg, a rank of 1 means that it's the most common name, and a rank of 10 means it's the tenth most common, etc).
Frequency is the percentage of people with that surname.
Per million people is the number of people with that surname per million of the population.

'A figure of zero indicates that we don't have data for this name (usually because it's quite uncommon and our stats don't go down that far). It doesn't mean that there's no-one with that name at all!

For less common surnames, the figures get progressively less reliable the fewer holders of that name there are. This data is aggregated from several public lists, and some stats are interpolated from known values. The margin of error is well over 100% at the rarest end of the table!

For less common surnames, the frequency and "per million" values may be 0 even though there are people with that name. That's because they represent less than one in a million of the population, which ends up as 0 after rounding.

It's possible for a surname to gain in rank and/or total while being less common per million people (or vice versa) as there are now more surnames in the USA as a result of immigration. In mathematical terms, the tail has got longer, with a far larger number of less common surnames.

Figures for top states show firstly the states where most people called O' SULLIVAN live. This obviously tends to be biased towards the most populous states. The second set of figures show where people called O' SULLIVAN represent the biggest proportion of the population. So, in this case, there are more people called O' SULLIVAN in New York than any other state, but you are more likely to find a O' SULLIVAN by picking someone at random in Massachusetts than anywhere else.

Classification and Origin of O' SULLIVAN

Region of origin: British Isles

Country of origin: Ireland

Language of origin: Gaelic

Ethnic origin: Celtic

Religious origin: Christian

Name derivation: From name of parent

Data for religion and/or language relates to the culture in which the O' SULLIVAN surname originated. It does not necessarily have any correlation with the language spoken, or religion practised, by the majority of current American citizens with that name.

Data for ethnic origin relates to the region and country in which the O' SULLIVAN surname originated. It does not necessarily have any correlation with the ethnicity of the majority of current American citizens with that name.

Ethnic distribution of O' SULLIVAN in the USA

Classification	Total	Percent
White (Hispanic)	173	1.59
Black/African American	144	1.32
Mixed Race	138	1.27
Asian/Pacific	82	0.75
Native American/Alaskan	11	0.1
White (Caucasian)	10,331	94.96

Ethnic distribution data shows the number and percentage of people with the O' SULLIVAN surname who reported their ethnic background as being in these broad categories in the most recent national census.

Similar names to O' SULLIVAN

The following names have similar spellings or pronunciations as O' SULLIVAN.

This does not necessarily imply a direct relationship between the names, but may indicate names that could be mistaken for this one when written down or misheard.