state senate districtColorado 4th State Senate District
presidential margin
2004–2024 · Democratic minus Republican
2004R+26.6
2008R+16.2
2012R+22.7
2016R+26.4
2020R+18.5
2024R+17.2
net swing · 2004→2024D+9.4R+26.6 → R+17.2
vs. U.S. · 2024R+15.7R+17.2 vs R+1.5
presidential returns
2024 turnout 77.9% of 145,525 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
45,469
64,945
2,998
113,412
145,525
77.9%
2020
45,226
66,336
2,483
114,045
137,418†
83.0%
2016
32,218
58,119
7,645
97,982
126,639†
77.4%
2012
34,522
54,770
103
89,395
117,810†
75.9%
2008
36,109
50,387
1,892
88,388
113,729†
77.7%
2004
28,799
50,067
1,094
79,960
109,648†
72.9%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. 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
GroupCO SD 4ColoradoUnited States
German23.0%17.9%12.5%
English17.2%12.6%9.5%
Irish14.6%11.2%9.4%
Italian6.7%4.9%4.8%
American3.9%3.5%5.3%
Scottish3.2%2.5%1.3%
Polish2.9%2.1%2.2%
French2.8%2.0%1.6%
Mexican5.6%15.8%11.3%
Spanish0.7%1.2%—
Spaniard0.7%1.0%—
Puerto Rican0.4%0.7%1.8%
African American†1.2%2.8%9.9%
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
CO SD 4
Colorado
United States
Median age
48.5
37.9
39.1
Age 18–24
7.2%
9.2%
9.2%
Age 65 and older
17.4%
15.5%
17.2%
Household economy
Measure
CO SD 4
Colorado
United States
Median household income
$94,757
$95,470
$84,427
Poverty rate
7.9%
9.5%
12.5%
Bachelor's degree or higher (25+)
52.8%
45.5%
35.6%
Languages at home
Measure
CO SD 4
Colorado
United States
Speaks a non-English language at home
9.3%
16.2%
22.3%
Spanish
4.7%
11.1%
13.6%
Other Indo-European
1.1%
1.0%
2.0%
Religious landscape
Measure
CO SD 4
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.
Colorado 4th State Senate District
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−26.6%
2008
−16.2%
2012
−22.7%
2016
−26.4%
2020
−18.5%
2024
−17.2%
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. † 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
R
40.1%Harris45,469
57.3%Trump64,945
2.6%
R+17.2
D+1.3
R+15.7
113,412
R
39.7%Biden45,226
58.2%Trump66,336
2.2%
R+18.5
D+7.9
R+23.0
114,045
R
32.9%Clinton32,218
59.3%Trump58,119
7.8%
R+26.4
R+3.8
R+28.5
97,982
R
38.6%Obama34,522
61.3%Romney54,770
0.1%
R+22.7
R+6.5
R+26.5
89,395
R
40.9%Obama36,109
57.0%McCain50,387
2.1%
R+16.2
D+10.4
R+23.4
88,388
R
36.0%Kerry28,799
62.6%Bush50,067
1.4%
R+26.6
—
R+24.1
79,960
current representation
Current officeholders
RMark BaisleyState Senate · 4
State legislative officeholder from OpenStates nightly current-legislator data.
Anchored in central Denver, this district delivers some of Colorado's most consistent Democratic supermajorities, reflecting a dense urban core where presidential margins have exceeded 50 points across multiple cycles.
Across the recorded series it reached a Republican high of 26.6 points in 2004. Between 2020 and 2024 the district moved 1.3 points toward the Democratic candidate; the 2024 margin was 17.2 points.
A population of 172,499, a 82% non-Hispanic-white share, and a median household income of $94,757 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 46 and State Senate District 3.
Akashic
Political twins — state-senate districts
The state-senate districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Colorado 4th State Senate District. Akashic. https://akashic.app/sld-upper/08004/. Accessed May 20, 2026. License: CC BY 4.0.
How did Colorado 4th State Senate District vote in 2024?
In 2024, Colorado 4th State Senate District voted Republican by 17.2 points (R+17.2), carried by the Republican candidate. Out of 113,412 votes cast, 45,469 went Democratic and 64,945 went Republican.
How many people live in Colorado 4th State Senate District?
Colorado 4th State Senate District has a population of 172,499 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Colorado 4th State Senate District?
Median household income in Colorado 4th State Senate District is $94,757 — above the national median of $80,734. The Colorado state median is $95,470.
What is the political history of Colorado 4th State Senate District?
Akashic tracks 6 presidential elections in Colorado 4th State Senate District from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
