Spencer Population

1960–2026

3,834

2026 projection

3.6% since 2020 (decrease)

01K2K3K4K5K1960197019801990200020102020

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal 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 Spencer. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
20263,834-230.60%
20253,857-350.90%
20243,892-110.28%
20233,903-160.41%
20223,919-250.63%
20213,944-340.85%
20203,978-100.25%
20193,988-40.10%
20183,992-140.35%
20174,006-340.84%

Showing 10 of 22 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

Spencer has a population change lower than Oklahoma County, Oklahoma, and the U.S.

  • Oklahoma+4.0%
  • United States+3.1%
  • Oklahoma County+3.0%
  • Spencer−3.1%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Spencer Demographics

44.2median age

Median age

Female45.6 yrs
Male43.2 yrs

Adults

2,889
929 seniors (65+) · 32% of adults1,960 other adults

Sex

Female 54.4% · 2,138Male 45.6% · 1,790

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 39 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

Spencer Income

$59,861median household income

Median household income

$59,861

Half of households earn more, half earn less

Median earnings

$36,870

Typical yearly pay for a worker 25 or older.

Poverty rate

15.1%

About 1 in 7 residents

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

Spencer Marital Status

54% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married54%59%51%
Never married25%28%23%
Divorced17%10%23%
Widowed3%2%4%
Separated<1%<1%<1%

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