O'Brien Population

2010–2026

91

2026 projection

1.1% since 2020 (increase)

020406080100120201020122014201620182020202220242026

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

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Population by year

Population estimates for O'Brien. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
20269100.00%
20259100.00%
202491+11.11%
20239000.00%
202290+11.12%
202189-11.11%
202090-1110.89%
2019101-10.98%
201810200.00%
2017102-10.97%

Showing 10 of 17 years.

O'Brien Demographics

24.3median age

Median age

Female44.4 yrs
Male18.8 yrs

Adults

93
40 seniors · 43%53 other adults

Sex

Female 45.4% · 59Male 54.6% · 71

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 1 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

O'Brien Marital Status

39% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married39%29%52%
Never married42%59%19%
Divorced6%9%2%
Widowed9%4%17%
Separated4%0%10%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201