† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupNew CastleColoradoUnited States
German17.6%17.9%12.5%
English14.2%12.6%9.5%
Irish11.6%11.2%9.4%
Italian4.5%4.9%4.8%
American3.7%3.5%5.3%
Scottish2.8%2.5%1.3%
Norwegian2.8%——
Polish2.3%2.1%2.2%
Mexican27.3%15.8%11.3%
Salvadoran1.6%0.3%0.7%
Spanish1.0%1.2%—
Argentinean0.7%——
Guatemalan0.5%—0.5%
Spaniard0.5%1.0%—
Puerto Rican0.4%0.7%1.8%
Honduran0.3%—0.3%
Maya2.0%——
Native Hawaiian1.0%——
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
New Castle
Colorado
United States
Median age
38.7
37.9
39.1
Age 18–24
7.2%
9.2%
9.2%
Age 65 and older
15.9%
15.5%
17.2%
Household economy
Measure
New Castle
Colorado
United States
Median household income
$80,084
$95,470
$84,427
Poverty rate
6.2%
9.5%
12.5%
Bachelor's degree or higher (25+)
32.1%
45.5%
35.6%
Languages at home
Measure
New Castle
Colorado
United States
Speaks a non-English language at home
31.5%
16.2%
22.3%
Spanish
30.9%
11.1%
13.6%
Religious landscape
Measure
New Castle
Colorado
United States
Catholic
—
15.1%
18.6%
Evangelical Protestant
—
11.7%
16.5%
Unclaimed / not counted
—
64.7%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
New Castle, Colorado
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−13.6%
2008
−4.4%
2012
−10.4%
2016
−8.9%
2020
+0.5%
2024
+10.1%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
53.5%Harris1,269
43.4%Trump1,030
3.2%
D+10.1
D+9.5
D+11.5
2,374
D
49.3%Biden1,304
48.7%Trump1,290
2.0%
D+0.5
D+9.4
R+3.9
2,647
R
40.6%Clinton924
49.5%Trump1,126
9.9%
R+8.9
D+1.5
R+11.0
2,274
R
43.6%Obama893
54.0%Romney1,106
2.3%
R+10.4
R+6.0
R+14.3
2,047
R
47.1%Obama886
51.5%McCain969
1.4%
R+4.4
D+9.2
R+11.7
1,881
R
42.5%Kerry716
56.1%Bush945
1.3%
R+13.6
—
R+11.1
1,683
New Castle has roughly doubled in population since 2000 as Garfield County's energy economy and proximity to Glenwood Springs drew working families westward, shifting its voter base toward a younger, more transient demographic than its ranching-era roots.
Across the recorded series it reached a Democratic high of 10.1 points in 2024 and a Republican high of 13.6 points in 2004. Between 2020 and 2024 the city moved 9.5 points toward the Democratic candidate; the 2024 margin was 10.1 points.
A population of 4,880, a 65% non-Hispanic-white share, and a median household income of $80,084 describe the city.
In 2024, New Castle, Colorado voted Democratic by 10.1 points (D+10.1), carried by the Democratic candidate. Out of 2,374 votes cast, 1,269 went Democratic and 1,030 went Republican.
When did New Castle, Colorado last vote Republican?
The most recent presidential election in which New Castle, Colorado voted Republican was 2016.
How many people live in New Castle, Colorado?
New Castle, Colorado has a population of 4,880 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in New Castle, Colorado?
Median household income in New Castle, Colorado is $80,084 — below the national median of $80,734. The Colorado state median is $95,470.
What is the political history of New Castle, Colorado?
Akashic tracks 6 presidential elections in New Castle, Colorado from 2004 to 2024. Of those, 2 went Democratic and 4 went Republican.
