American Surname Summary Data for OCONNOR

Frequency Comparisons
Total Rank Frequency % Per million people
United States
United States (Current snapshot) 74,756 385 0.028 277
United States (1880 census) 2,722 2231 0.005 54
Change since 1880 +72034 +1846 +0.023 +223
Other Countries
Australia 123 11894 0.001 8
United Kingdom 1,931 3060 0.004 42

Top States for OCONNOR by Total
State Total Rank in State Frequency % Per million people
New York 9,591 96 0.051 505
Massachusetts 6,783 47 0.107 1,068
California 5,962 493 0.018 176
Florida 4,874 332 0.030 305
Illinois 4,670 198 0.038 376
Top States for OCONNOR by Frequency
State Total Rank in State Frequency % Per million people
Massachusetts 6,783 47 0.107 1,068
Connecticut 2,243 84 0.066 659
New Hampshire 763 154 0.062 617
Rhode Island 619 122 0.059 590
New York 9,591 96 0.051 505

  • 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.

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

Similar Names

The following names have similar spellings or pronunciations as OCONNOR.

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.

The most likely matches are shown first.


Matches are generated automatically by a combination of Soundex, Metaphone and Levenshtein matching.

Common Misspellings and Typos

The following words are slight variants of OCONNOR that are likely to be possible typos or misspellings in written material.