O'Neill Population

1880–2026

3,564

2026 projection

0.1% since 2020 (decrease)

01K2K3K4K5K18801900192019401960198020002020

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

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for O'Neill. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
20263,564-30.08%
20253,567+90.25%
20243,558-220.61%
20233,580+210.59%
20223,559+40.11%
20213,555-140.39%
20203,569-160.45%
20193,585-240.67%
20183,609-170.47%
20173,626+30.08%

Showing 10 of 30 years.

O'Neill Demographics

41.9median age

Median age

Female41.5 yrs
Male43.4 yrs

Adults

2,679
800 seniors · 30%1,879 other adults

Sex

Female 56.8% · 2,026Male 43.2% · 1,544

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 36 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'Neill Income

$56,510median household income

Median household income

$56,510

Half of households earn more, half earn less

Median earnings

$42,202

Typical yearly pay for a worker 25 or older.

Poverty rate

18.5%

About 1 in 5 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

O'Neill Marital Status

50% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married50%58%44%
Never married26%22%28%
Divorced15%16%14%
Widowed9%4%13%
Separated<1%0%1%

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