Belfast Population

2010–2026

604

2026 projection

19.7% since 2020 (decrease)

02004006008001K201020122014201620182020202220242026

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.

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Population by year

Population estimates for Belfast. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026604-152.42%
2025619-292.26%
2023648-60.92%
2022654-243.54%
2021678-749.84%
2020752-192.46%
2019771+567.83%
2018715-10813.12%
2017823-434.97%
2016866-414.52%

Showing 10 of 16 years.

Belfast Demographics

34.5median age

Median age

Female34.7 yrs
Male33.8 yrs

Adults

456
111 seniors (65+) · 24% of adults345 other adults

Sex

Female 56.9% · 360Male 43.1% · 273

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 6 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

Belfast Income

$56,250median household income

Median household income

$56,250

Half of households earn more, half earn less

Median earnings

$42,946

Typical yearly pay for a worker 25 or older.

Poverty rate

11.7%

About 1 in 9 residents

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

Belfast Marital Status

45% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married45%49%41%
Never married34%46%24%
Divorced13%3%22%
Widowed8%2%14%
Separated0%0%0%

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