2020 Presidential Primary Election Turnout

Calculated as a percentage of active voters

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County	Active voters	Ballots cast	Turnout %
Adams	263,502	117,645	44.65%
Alamosa	8,769	4,354	49.65%
Arapahoe	381,383	184,591	48.40%
Archuleta	9,508	5,025	52.85%
Baca	2,563	1,472	57.43%
Bent	2,576	1,392	54.04%
Boulder	218,635	136,425	62.40%
Broomfield	47,864	27,030	56.47%
Chaffee	13,910	8,695	62.51%
Cheyenne	1,233	758	61.48%
Clear Creek	7,157	3,746	52.34%
Conejos	4,907	2,570	52.37%
Costilla	2,451	1,121	45.74%
Crowley	1,988	1,129	56.79%
Custer	3,740	2,320	62.03%
Delta	20,590	11,709	56.87%
Denver	425,397	233,613	54.92%
Dolores	1,548	878	56.72%
Douglas	239,346	118,513	49.52%
Eagle	31,382	14,793	47.14%
El Paso	415,541	200,665	48.29%
Elbert	19,653	10,590	53.88%
Fremont	28,218	14,497	51.38%
Garfield	33,785	16,791	49.70%
Gilpin	4,492	2,281	50.78%
Grand	10,857	5,533	50.96%
Gunnison	11,325	6,265	55.32%
Hinsdale	661	387	58.55%
Huerfano	4,743	2,809	59.22%
Jackson	978	594	60.74%
Jefferson	400,552	220,526	55.06%
Kiowa	969	629	64.91%
Kit Carson	4,387	2,524	57.53%
La Plata	37,941	20,331	53.59%
Lake	4,365	2,040	46.74%
Larimer	236,617	126,009	53.25%
Las Animas	9,122	4,629	50.75%
Lincoln	2,864	1,705	59.53%
Logan	11,440	6,611	57.79%
Mesa	96,838	48,766	50.36%
Mineral	763	496	65.01%
Moffat	7,889	3,820	48.42%
Montezuma	16,978	8,910	52.48%
Montrose	26,386	14,532	55.07%
Morgan	15,765	7,180	45.54%
Otero	11,105	5,635	50.74%
Ouray	4,048	2,555	63.12%
Park	13,121	6,789	51.74%
Phillips	2,680	1,528	57.01%
Pitkin	12,865	6,544	50.87%
Prowers	6,399	3,332	52.07%
Pueblo	101,773	48,285	47.44%
Rio Blanco	4,027	2,368	58.80%
Rio Grande	6,886	3,619	52.56%
Routt	17,655	9,195	52.08%
Saguache	3,914	2,056	52.53%
San Juan	603	317	52.57%
San Miguel	5,515	3,075	55.76%
Sedgwick	1,604	943	58.79%
Summit	20,043	9,346	46.63%
Teller	17,580	9,403	53.49%
Washington	3,044	1,941	63.76%
Weld	181,667	79,408	43.71%
Yuma	5,592	3,087	55.20%
Total	3,511,699	1,806,325	51.44%

Calculated as a percentage of registered voters

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County	Registered voters	Ballots cast	Turnout %
Adams	293,713	117,645	40.05%
Alamosa	10,282	4,354	42.35%
Arapahoe	435,484	184,591	42.39%
Archuleta	11,002	5,025	45.67%
Baca	2,902	1,472	50.72%
Bent	3,177	1,392	43.81%
Boulder	246,269	136,425	55.40%
Broomfield	53,733	27,030	50.30%
Chaffee	15,876	8,695	54.77%
Cheyenne	1,397	758	54.26%
Clear Creek	8,186	3,746	45.76%
Conejos	5,305	2,570	48.44%
Costilla	2,813	1,121	39.85%
Crowley	2,232	1,129	50.58%
Custer	4,185	2,320	55.44%
Delta	22,535	11,709	51.96%
Denver	493,923	233,613	47.30%
Dolores	1,846	878	47.56%
Douglas	261,114	118,513	45.39%
Eagle	35,906	14,793	41.20%
El Paso	478,515	200,665	41.93%
Elbert	21,506	10,590	49.24%
Fremont	31,239	14,497	46.41%
Garfield	38,467	16,791	43.65%
Gilpin	5,353	2,281	42.61%
Grand	12,447	5,533	44.45%
Gunnison	13,553	6,265	46.23%
Hinsdale	761	387	50.85%
Huerfano	5,403	2,809	51.99%
Jackson	1,249	594	47.56%
Jefferson	439,441	220,526	50.18%
Kiowa	1,050	629	59.90%
Kit Carson	4,930	2,524	51.20%
La Plata	45,631	20,331	44.56%
Lake	5,515	2,040	36.99%
Larimer	266,923	126,009	47.21%
Las Animas	11,007	4,629	42.06%
Lincoln	3,253	1,705	52.41%
Logan	12,604	6,611	52.45%
Mesa	112,034	48,766	43.53%
Mineral	879	496	56.43%
Moffat	9,315	3,820	41.01%
Montezuma	19,688	8,910	45.26%
Montrose	29,261	14,532	49.66%
Morgan	17,313	7,180	41.47%
Otero	12,495	5,635	45.10%
Ouray	4,589	2,555	55.68%
Park	15,209	6,789	44.64%
Phillips	3,300	1,528	46.30%
Pitkin	14,456	6,544	45.27%
Prowers	7,327	3,332	45.48%
Pueblo	113,044	48,285	42.71%
Rio Blanco	4,552	2,368	52.02%
Rio Grande	8,036	3,619	45.03%
Routt	20,193	9,195	45.54%
Saguache	4,469	2,056	46.01%
San Juan	721	317	43.97%
San Miguel	6,329	3,075	48.59%
Sedgwick	1,822	943	51.76%
Summit	24,535	9,346	38.09%
Teller	20,530	9,403	45.80%
Washington	3,431	1,941	56.57%
Weld	201,924	79,408	39.33%
Yuma	6,009	3,087	51.37%
Total	3,972,188	1,806,325	45.47%