Boulder, CO · which candidate this place backed in each party’s presidential nominating contest, cycle by cycle. A primary is a contest inside one party, so it has no Democratic–Republican margin and is not part of the general-election record above.
Akashic reports votes cast, not delegates awarded. The two can disagree: Clinton led the 2008 national primary popular vote by less than half a point and did not win the nomination.
Primary returns are published at county grain, and this place is a single county: Boulder County, Colorado. The figures below are that county’s, which is the same territory — not a larger unit standing in for it.
Presidential nominating contests in Boulder, CO, by party and cycle.
○no contest record — Akashic holds no result for that party and cycle here. It is not a claim that no contest was held. Telling apart a contest that was cancelled, one that went uncontested, and one simply not yet ingested needs a nominating-contest calendar, which is a separate ingest from results and does not exist yet.
Republican presidential primaries are not yet ingested — the Republican series runs from 1856 and is in scope. The row is kept so its absence is visible: a Democratic-only panel would otherwise read as though no one else held a contest.
Akashic carries 10 states for 2012 and 3 states for 2024. Cycles in which an incumbent president seeks renomination are thin by nature — few states run a contested primary — so a sparse column is politics, not a hole in the record.
County returns carry a leader and a lead over the runner-up, and nothing more. The full candidate field with vote shares is published at state grain — follow a cycle above to the state contest for it.
voter registration
Registered voters
By party of registration, over time
Party registration · 2024D+28.0
vs
Presidential vote · 2024D+55.7
Registration leans Democratic; the presidential vote runs 28 points more Democratic than the rolls.
DemocraticRepublicanUnaffiliatedOther parties
Voter registration in Boulder, CO
Year
Total registered
Democratic
Republican
Unaffiliated
Other
2016
266,217
113,733
45,569
101,653
5,262
2018
251,112
107,352
37,701
101,246
4,813
2020
257,455
109,959
34,264
109,012
4,220
2022
258,327
105,079
29,623
119,557
4,068
2024
266,648
102,792
28,261
130,436
5,159
domestic migration
Who moves in and out
Net domestic migration over time
−2,248 net domestic migration · 2025
20112025
Net +2,985 over 2011–2025 · gain loss
Domestic migration in Boulder, CO in Boulder, CO: net domestic migration by year
Year
Net domestic migration
2011
+2,416
2012
+2,401
2013
+2,715
2014
+788
2015
+3,499
2016
+1,288
2017
−423
2018
+491
2019
−42
2021
−4,247
2022
−624
2023
−1,976
2024
−1,053
2025
−2,248
Boulder's electorate skews younger and more degree-holding than any other Colorado metro, a demographic profile that has made it among the most consistently lopsided jurisdictions on the Front Range for two decades.
Across the recorded series it reached a Democratic high of 69.5 points in 1896 and a Republican high of 36.4 points in 1892. Between 2020 and 2024 the metro moved 0.8 points toward the Republican candidate; the 2024 margin was 55.7 points.
A population of 328,961, a 75% non-Hispanic-white share, and a median household income of $103,994 describe the metro. The metro's voting pattern over the last decade is most similar to that of Charlottesville, VA and Ann Arbor, MI.
Akashic
Political twins — metros
The metros 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 →
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Boulder, CO, Colorado. Akashic. https://akashic.app/cbsa/14500/. Accessed May 20, 2026. License: CC BY 4.0.
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In 2024, Boulder, CO, Colorado voted Democratic by 55.7 points (D+55.7), carried by the Democratic candidate. Out of 196,304 votes cast, 150,149 went Democratic and 40,758 went Republican.
When did Boulder, CO, Colorado last vote Republican?
The most recent presidential election in which Boulder, CO, Colorado voted Republican was 1984.
How many people live in Boulder, CO, Colorado?
Boulder, CO, Colorado has a population of 328,961 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Boulder, CO, Colorado?
Median household income in Boulder, CO, Colorado is $103,994 — above the national median of $80,734. The Colorado state median is $95,470.
What is the political history of Boulder, CO, Colorado?
Akashic tracks 34 presidential elections in Boulder, CO, Colorado from 1892 to 2024. Of those, 18 went Democratic and 15 went Republican.
