History of your Surname
Get access to O family records.Start a free trial

O Family History

O Name Meaning

Variant of Korean and Chinese Oh.

Source: Dictionary of American Family Names ©2013, Oxford University Press

Similar surnames: U, Ho, Jo, To, Ko, Do, Oh, Lo, Po, Ow

Search for a relative to learn more about your family history.

Hint: Try searching for a relative alive in 1940.

Black & white image of a young woman scientist

Where is the O family from?

You can see how O families moved over time by selecting different census years. The O family name was found in the USA, Canada, and Scotland between 1851 and 1920. The most O families were found in the USA in 1880. In 1911 there were 4 O families living in Ontario. This was about 80% of all the recorded O's in Canada. Ontario had the highest population of O families in 1911.
Use census records and voter lists to see where families with the O surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.

What did your O ancestors do for a living?

In 1940, Laborer and Maid were the top reported jobs for men and women in the US named O. 44% of O men worked as a Laborer and 34% of O women worked as a Maid. Some less common occupations for Americans named O were New Worker and Housework.

View Census data for O | Data not to scale

*We display top occupations by gender to maintain their historical accuracy during times when men and women often performed different jobs.

United States shown, Canada data unavailable

Top Male Occupations in 1940

  • Laborer
  • Farmer
  • Farming
  • New Worker

Top Female Occupations in 1940

  • Maid
  • Housekeeper
  • Housewife
  • Housework
Black & white image of two construction labourers

What O family records will you find?

Census Records

There are 934,000 census records available for the last name O. Like a window into their day-to-day life, O census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

Search Canadian census records for O

Passenger Lists

There are 103,000 immigration records available for the last name O. Passenger lists are your ticket to knowing when your ancestors arrived in Canada, and how they made the journey - from the ship name to ports of arrival and departure.

View all O immigration records

Draft Cards

There are 61,000 military records available for the last name O. For the veterans among your O ancestors, military collections provide insights into where and when they served, and even physical descriptions.

View all O military records

You've only scratched the surface of O family history.

Discover More

What is the average O lifespan?

Between 1977 and 2004, in the United States, O life expectancy was at its lowest point in 1985, and highest in 2004. The average life expectancy for O in 1977 was 38, and 88 in 2004.

View Social Security Death Index (SSDI) for O

Discover the unique achievements of ancestors in the O family tree

Explore Your Tree
Search for another surname
Start a 14-Day Free Trial