State Line Population

2010–2026

38

2026 projection

2.6% since 2020 (decrease)

01020304050201020122014201620182020202220242026

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 State Line. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
20263800.00%
202538+25.56%
20243600.00%
202336-12.70%
202237+25.71%
202135-410.26%
202039+25.41%
201937+12.78%
201836-12.70%
201737-25.13%

Showing 10 of 17 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

State Line is growing faster than the U.S., and slower than Kootenai County and Idaho.

  • Kootenai County+11.0%
  • Idaho+9.8%
  • State Line+8.6%
  • United States+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.

State Line Demographics

26.5median age

Median age

Female31 yrs
Male18.5 yrs

Adults

6
0 seniors (65+) · 0% of adults6 other adults

Sex

Female 44.4% · 4Male 55.6% · 5

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 0.09 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

State Line Income

$48,750median household income

Median household income

$48,750

Half of households earn more, half earn less

Median earnings

$28,750

Typical yearly pay for a worker 25 or older.

Poverty rate

11.1%

About 1 in 9 residents

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

State Line Marital Status

63% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married63%75%50%
Never married25%25%25%
Divorced0%0%0%
Widowed13%0%25%
Separated0%0%0%

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