Ottawa Population

1870–2026

12,736

2026 projection

0.8% since 2020 (increase)

02K4K6K8K10K12K14K18801900192019401960198020002020

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 Ottawa. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202612,736+200.16%
202512,716+20.02%
202412,714+110.09%
202312,703+1040.83%
202212,599-380.30%
202112,637+50.04%
202012,632+3362.73%
201912,296-60.05%
201812,302-180.15%
201712,320+340.28%

Showing 10 of 31 years.

Ottawa Demographics

36.9median age

Median age

Female37.4 yrs
Male36.2 yrs

Adults

9,788
1,889 seniors · 19%7,899 other adults

Sex

Female 49.8% · 6,312Male 50.2% · 6,366

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 127 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

Ottawa Income

$71,699median household income

Median household income

$71,699

Half of households earn more, half earn less

Median earnings

$46,103

Typical yearly pay for a worker 25 or older.

Poverty rate

9.1%

About 1 in 11 residents

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

Ottawa Marital Status

49% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married49%49%48%
Never married33%36%30%
Divorced12%13%12%
Widowed6%2%11%
Separated0%0%<1%

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