The table below presents the following information:
The rank of the county within the state by population as of July 1, 2018, as estimated by the U.S. Census Bureau .[ 1]
The official name of the county.[ 2]
The county population as of July 1, 2018, as estimated by the U.S. Census Bureau.[ 1]
The county population as a percentage of the Colorado state population as of July 1, 2018, as estimated by the U.S. Census Bureau.[ 1]
The rank of the municipality within the county by population within the county as of July 1, 2018, as estimated by the U.S. Census Bureau.[ 1]
The official name of the municipality.[ 3] The county seat is shown in bold .[ 4] If the municipality extends beyond the county, the percentage of the municipal population that resides within the county is mentioned.[ 1]
The municipal population within the county as of July 1, 2018, as estimated by the U.S. Census Bureau.[ 1]
The municipal population within the county as a percentage of the county population as of July 1, 2018, as estimated by the U.S. Census Bureau.[ 1]
A map showing the location of the county within the State of Colorado.[ 5]
Colorado Municipalities by County
Rank
County
Population
% State
Rank
Municipality
Population
% County
Map
1
City and County of Denver
716,492
12.58%
1
City and County of Denver
716,492
100%
2
El Paso County
713,856
12.53%
1
City of Colorado Springs
472,688
66.22%
2
City of Fountain
30,454
4.27%
3
Town of Monument
8,010
1.12%
4
City of Manitou Springs
5,346
0.75%
5
Town of Palmer Lake
2,772
0.39%
6
Town of Calhan
834
0.12%
7
Town of Green Mountain Falls (95.47%)
674
0.09%
8
Town of Ramah
129
0.02%
U
unincorporated area
192,949
27.03%
3
Arapahoe County
651,215
11.43%
1
City of Aurora (86.84%)
324,897
49.89%
2
City of Centennial
110,831
17.02%
3
City of Littleton (94.36%)
45,298
6.96%
4
City of Englewood
34,690
5.33%
5
City of Greenwood Village
15,801
2.43%
6
City of Cherry Hills Village
6,650
1.02%
7
City of Sheridan
6,164
0.95%
8
City of Glendale
5,170
0.79%
9
Town of Columbine Valley
1,488
0.23%
10
Town of Foxfield
792
0.12%
11
Town of Deer Trail
736
0.11%
12
Town of Bow Mar (70.82%)
670
0.10%
13
Town of Bennett (15.88%)
399
0.06%
U
unincorporated area
97,629
14.99%
4
Jefferson County
580,233
10.19%
1
City of Lakewood
156,798
27.02%
2
City of Arvada (97.32%)
117,268
20.21%
3
City of Westminster (38.85%)
44,085
7.60%
4
City of Wheat Ridge
31,400
5.41%
5
City of Golden
21,254
3.66%
6
City of Edgewater
5,342
0.92%
7
City of Littleton (5.58%)
2,678
0.46%
8
Town of Mountain View
537
0.09%
9
Town of Morrison
424
0.07%
10
Town of Bow Mar (29.18%)
276
0.05%
11
Town of Lakeside
8
0.00%
12
Town of Superior (0%)
0
0%
U
unincorporated area
200,163
34.50%
5
Adams County
511,868
8.99%
1
City of Thornton (100%)
139,436
27.24%
2
City of Westminster (61.15%)
69,394
13.56%
3
City of Commerce City
58,449
11.42%
4
City of Aurora (12.75%)
47,702
9.32%
5
City of Brighton (97.80%)
40,348
7.88%
6
City of Northglenn (99.95%)
38,990
7.62%
7
City of Federal Heights
12,845
2.51%
8
City of Arvada (2.68%)
3,224
0.63%
9
Town of Bennett (84.12%)
2,113
0.41%
10
Town of Lochbuie (0.03%)
2
0.00%
U
unincorporated area
99,365
19.41%
6
Larimer County
350,518
6.15%
1
City of Fort Collins
167,830
47.88%
2
City of Loveland
77,446
22.09%
3
Town of Wellington
9,994
2.85%
4
Town of Berthoud (97.38%)
7,738
2.21%
5
Town of Windsor (25.13%)
7,279
2.08%
6
Town of Estes Park
6,352
1.81%
7
Town of Timnath (99.95%)
3,990
1.14%
8
Town of Johnstown (14.40%)
2,130
0.61%
U
unincorporated area
67,759
19.33%
7
Douglas County
342,776
6.02%
1
Town of Castle Rock
64,827
18.91%
2
Town of Parker
55,636
16.23%
3
City of Lone Tree
14,653
4.27%
4
City of Castle Pines
10,507
3.07%
5
City of Aurora (0.40%)
1,515
0.44%
6
Town of Larkspur
205
0.06%
6
City of Littleton (0.06%)
31
0.01%
U
unincorporated area
195,402
57.01%
8
Boulder County
326,078
5.73%
1
City of Boulder
107,353
32.92%
2
City of Longmont (99.39%)
95,988
29.44%
3
City of Lafayette
28,924
8.87%
4
City of Louisville
21,163
6.49%
5
Town of Superior (100%)
13,175
4.04%
6
Town of Erie (43.98%)
11,191
3.43%
7
Town of Lyons
2,155
0.66%
8
Town of Nederland
1,547
0.47%
9
Town of Jamestown
268
0.08%
10
Town of Ward
164
0.05%
U
unincorporated area
44,150
13.54%
9
Weld County
314,305
5.52%
1
City of Greeley
107,348
34.15%
2
Town of Windsor (74.87%)
21,688
6.90%
3
City of Evans
21,236
6.76%
4
Town of Firestone
14,860
4.73%
5
Town of Erie (56.02%)
14,256
4.54%
6
Town of Frederick
13,480
4.29%
7
Town of Johnstown (85.60%)
12,665
4.03%
8
City of Fort Lupton
8,275
2.63%
9
Town of Milliken
7,674
2.44%
10
Town of Lochbuie (99.97%)
6,936
2.21%
11
City of Dacono
5,826
1.85%
12
Town of Eaton
5,529
1.76%
13
Town of Severance
5,064
1.61%
14
Town of Mead
4,737
1.51%
15
Town of Platteville
2,769
0.88%
16
Town of LaSalle
2,346
0.75%
17
Town of Ault
1,843
0.59%
18
Town of Hudson
1,838
0.58%
19
Town of Kersey
1,655
0.53%
20
Town of Keenesburg
1,229
0.39%
21
Town of Pierce
1,132
0.36%
22
Town of Gilcrest
1,108
0.35%
23
City of Brighton (2.20%)
906
0.29%
24
City of Longmont (0.61%)
589
0.19%
25
Town of Nunn
463
0.15%
26
Town of Garden City
265
0.08%
27
Town of Berthoud (2.62%)
208
0.07%
28
Town of Grover
153
0.05%
29
Town of Raymer
110
0.03%
30
City of Northglenn (0.05%)
20
0.01%
31
Town of Timnath (0.05%)
2
0.00%
32
City of Thornton (0%)
0
0%
U
unincorporated area
48,095
15.30%
10
Pueblo County
167,529
2.94%
1
City of Pueblo
111,750
66.70%
2
Town of Boone
362
0.22%
3
Town of Rye
162
0.10%
U
unincorporated area
55,255
32.98%
11
Mesa County
153,207
2.69%
1
City of Grand Junction
63,374
41.36%
2
City of Fruita
13,406
8.75%
3
Town of Palisade
2,714
1.77%
4
Town of Collbran
698
0.46%
5
Town of De Beque
503
0.33%
U
unincorporated area
72,512
47.33%
12
City and County of Broomfield
69,267
1.22%
1
City and County of Broomfield
69,267
100%
13
Garfield County
59,770
1.05%
1
City of Glenwood Springs
9,972
16.68%
2
City of Rifle
9,732
16.28%
3
Town of Carbondale
6,879
11.51%
4
Town of New Castle
5,024
8.41%
5
Town of Silt
3,181
5.32%
6
Town of Parachute
1,120
1.87%
7
Town of Carbonate
0
0.00%
U
unincorporated area
23,862
39.92%
14
La Plata County
56,310
0.99%
1
City of Durango
18,985
33.72%
2
Town of Bayfield
2,705
4.80%
3
Town of Ignacio
888
1.58%
U
unincorporated area
33,732
59.90%
15
Eagle County
54,993
0.97%
1
Town of Gypsum
7,353
13.37%
2
Town of Eagle
6,961
12.66%
3
Town of Avon
6,482
11.79%
4
Town of Vail
5,450
9.91%
5
Town of Basalt (76.86%)
3,202
5.82%
6
Town of Minturn
1,129
2.05%
7
Town of Red Cliff
279
0.51%
U
unincorporated area
24,137
43.89%
16
Fremont County
48,021
0.84%
1
City of Cañon City
16,750
34.88%
2
City of Florence
3,956
8.24%
3
Town of Williamsburg
702
1.46%
4
Town of Rockvale
512
1.07%
5
Town of Coal Creek
348
0.72%
6
Town of Brookside
260
0.54%
U
unincorporated area
25,493
53.09%
17
Montrose County
42,214
0.74%
1
City of Montrose
19,512
46.22%
2
Town of Olathe
1,825
4.32%
3
Town of Nucla
717
1.70%
4
Town of Naturita
541
1.28%
U
unincorporated area
19,619
46.48%
18
Summit County
31,007
0.54%
1
Town of Breckenridge
5,020
16.19%
2
Town of Silverthorne
4,821
15.55%
3
Town of Frisco
3,157
10.18%
[ a]
Town of Keystone
[ b]
[ c]
4
Town of Dillon
973
3.14%
5
Town of Blue River
927
2.99%
6
Town of Montezuma
68
0.22%
U
unincorporated area
16,041
51.73%
19
Delta County
30,953
0.54%
1
City of Delta
8,920
28.82%
2
Town of Orchard City
3,161
10.21%
3
Town of Cedaredge
2,266
7.32%
4
Town of Paonia
1,462
4.72%
5
Town of Hotchkiss
933
3.01%
6
Town of Crawford
424
1.37%
U
unincorporated area
13,787
44.54%
20
Morgan County
28,558
0.50%
1
City of Fort Morgan
11,359
39.78%
2
City of Brush
5,384
18.85%
3
Town of Wiggins
996
3.49%
4
Town of Log Lane Village
874
3.06%
5
Town of Hillrose
254
0.89%
U
unincorporated area
9,691
33.93%
21
Elbert County
26,282
0.46%
1
Town of Elizabeth
1,416
5.39%
2
Town of Kiowa
757
2.88%
3
Town of Simla
639
2.43%
U
unincorporated area
23,470
89.30%
22
Montezuma County
26,158
0.46%
1
City of Cortez
8,721
33.34%
2
Town of Mancos
1,419
5.42%
3
Town of Dolores
958
3.66%
U
unincorporated area
15,060
57.57%
23
Routt County
25,733
0.45%
1
City of Steamboat Springs
13,212
51.34%
2
Town of Hayden
1,970
7.66%
3
Town of Oak Creek
966
3.75%
4
Town of Yampa
464
1.80%
U
unincorporated area
9,121
35.44%
24
Teller County
25,083
0.44%
1
City of Woodland Park
7,785
31.04%
2
City of Cripple Creek
1,267
5.05%
3
City of Victor
415
1.65%
4
Town of Green Mountain Falls (4.53%)
32
0.13%
U
unincorporated area
15,584
62.13%
25
Logan County
21,528
0.38%
1
City of Sterling
13,630
63.31%
2
Town of Fleming
404
1.88%
3
Town of Merino
279
1.30%
4
Town of Iliff
263
1.22%
5
Town of Peetz
234
1.09%
6
Town of Crook
108
0.50%
U
unincorporated area
6,610
30.70%
26
Chaffee County
20,027
0.35%
1
City of Salida
5,963
29.77%
2
Town of Buena Vista
2,823
14.10%
3
Town of Poncha Springs
940
4.69%
U
unincorporated area
10,301
51.44%
27
Park County
18,556
0.36%
1
Town of Fairplay
762
4.11%
2
Town of Alma
312
1.68%
U
unincorporated area
17,482
94.21%
28
Otero County
18,432
0.32%
1
City of La Junta
6,998
37.97%
2
City of Rocky Ford
3,828
20.77%
3
Town of Fowler
1,144
6.21%
4
Town of Swink
596
3.23%
5
Town of Manzanola
419
2.27%
6
Town of Cheraw
250
1.36%
U
unincorporated area
5,197
28.20%
29
Pitkin County
17,950
0.32%
1
City of Aspen
7,365
41.03%
2
Town of Snowmass Village
2,773
15.45%
3
Town of Basalt (23.14%)
964
5.37%
U
unincorporated area
6,848
38.15%
30
Gunnison County
17,246
0.30%
1
City of Gunnison
6,594
38.23%
2
Town of Crested Butte
1,681
9.75%
3
Town of Mount Crested Butte
852
4.94%
4
Town of Marble
144
0.83%
5
Town of Pitkin
72
0.42%
U
unincorporated area
7,903
45.83%
31
Alamosa County
16,683
0.29%
1
City of Alamosa
9,997
59.92%
2
Town of Hooper
101
0.61%
U
unincorporated area
6,585
39.47%
32
Grand County
15,525
0.27%
1
Town of Granby
2,098
13.51%
2
Town of Kremmling
1,503
9.68%
3
Town of Fraser
1,302
8.39%
4
Town of Winter Park
1,051
6.77%
5
Town of Hot Sulphur Springs
716
4.61%
6
Town of Grand Lake
504
3.25%
U
unincorporated area
8,351
53.79%
33
Las Animas County
14,503
0.25%
1
City of Trinidad
8,211
56.62%
2
Town of Aguilar
484
3.34%
3
Town of Cokedale
121
0.83%
4
Town of Branson
69
0.48%
4
Town of Kim
69
0.48%
5
Town of Starkville
55
0.38%
U
unincorporated area
5,494
37.88%
34
Archuleta County
13,765
0.24%
1
Town of Pagosa Springs
2,005
14.57%
U
unincorporated area
11,760
85.43%
35
Moffat County
13,188
0.23%
1
City of Craig
8,947
67.84%
2
Town of Dinosaur
329
2.49%
U
unincorporated area
3,912
29.66%
36
Prowers County
12,164
0.21%
1
City of Lamar
7,656
62.94%
2
Town of Holly
775
6.37%
3
Town of Granada
500
4.11%
4
Town of Wiley
393
3.23%
5
Town of Hartman
75
0.62%
U
unincorporated area
2,765
22.73%
37
Rio Grande County
11,250
0.20%
1
City of Monte Vista
4,124
36.66%
2
Town of Del Norte
1,563
13.89%
3
Town of South Fork
351
3.12%
4
Town of Center (8.64%)
199
1.77%
U
unincorporated area
5,013
44.56%
38
Yuma County
10,020
0.18%
1
City of Yuma
3,460
34.53%
2
City of Wray
2,334
23.29%
3
Town of Eckley
258
2.57%
U
unincorporated area
3,968
39.60%
39
Clear Creek County
9,605
0.17%
1
City of Idaho Springs
1,794
18.68%
2
Town of Georgetown
1,088
11.33%
3
Town of Empire
303
3.15%
4
Town of Silver Plume
176
1.83%
5
Central City (0%)
0
0%
U
unincorporated area
6,244
65.01%
40
Conejos County
8,200
0.14%
1
Town of Manassa
993
12.11%
2
Town of Sanford
880
10.73%
3
Town of La Jara
803
9.79%
4
Town of Antonito
753
9.18%
5
Town of Romeo
406
4.95%
U
unincorporated area
4,365
53.23%
41
San Miguel County
8,191
0.14%
1
Town of Telluride
2,484
30.33%
2
Town of Mountain Village
1,434
17.51%
3
Town of Norwood
591
7.22%
4
Town of Ophir
179
2.19%
5
Town of Sawpit
39
0.48%
U
unincorporated area
3,464
42.29%
42
Lake County
7,824
0.14%
1
City of Leadville
2,762
35.30%
U
unincorporated area
5,062
64.70%
43
Kit Carson County
7,163
0.13%
1
City of Burlington
3,178
44.37%
2
Town of Stratton
650
9.07%
3
Town of Flagler
551
7.69%
4
Town of Bethune
237
3.31%
5
Town of Seibert
216
3.02%
6
Town of Vona
104
1.45%
U
unincorporated area
2,227
31.09%
44
Huerfano County
6,889
0.12%
1
City of Walsenburg
3,046
44.22%
2
Town of La Veta
810
11.76%
U
unincorporated area
3,033
44.03%
45
Saguache County
6,843
0.12%
1
Town of Center (91.36%)
2,105
30.76%
2
Town of Saguache
504
7.37%
3
Town of Crestone
146
2.13%
4
Town of Moffat
120
1.75%
5
Town of Bonanza
19
0.28%
U
unincorporated area
3,949
57.71%
46
Rio Blanco County
6,336
0.11%
1
Town of Rangely
2,291
36.16%
2
Town of Meeker
2,261
35.68%
U
unincorporated area
1,784
28.16%
47
Gilpin County
6,121
0.11%
1
Central City (100%)
765
12.50%
2
City of Black Hawk
127
2.07%
U
unincorporated area
5,229
85.43%
48
Bent County
5,882
0.10%
1
City of Las Animas
2,190
37.23%
U
unincorporated area
3,692
62.77%
49
Crowley County
5,858
0.10%
1
Town of Ordway
1,028
17.55%
2
Town of Olney Springs
329
5.62%
3
Town of Sugar City
246
4.20%
4
Town of Crowley
167
2.85%
U
unincorporated area
4,088
69.78%
50
Lincoln County
5,610
0.10%
1
Town of Limon
1,924
34.30%
2
Town of Hugo
748
13.33%
3
Town of Arriba
202
3.60%
4
Town of Genoa
145
2.58%
U
unincorporated area
2,591
46.19%
51
Custer County
4,954
0.09%
1
Town of Silver Cliff
657
13.26%
2
Town of Westcliffe
620
12.52%
U
unincorporated area
3,677
74.22%
52
Washington County
4,909
0.09%
1
Town of Akron
1,723
35.10%
2
Town of Otis
485
9.88%
U
unincorporated area
2,701
55.02%
53
Ouray County
4,833
0.08%
1
Town of Ridgway
1,016
21.02%
2
City of Ouray
1,010
20.90%
U
unincorporated area
2,807
58.08%
54
Phillips County
4,286
0.08%
1
City of Holyoke
2,217
51.73%
2
Town of Haxtun
907
21.16%
3
Town of Paoli
35
0.82%
U
unincorporated area
1,127
26.29%
55
Costilla County
3,828
0.07%
1
Town of San Luis
644
16.82%
2
Town of Blanca
397
10.37%
U
unincorporated area
2,787
72.81%
56
Baca County
3,585
0.06%
1
Town of Springfield
1,379
38.47%
2
Town of Walsh
517
14.42%
3
Town of Pritchett
132
3.68%
4
Town of Vilas
107
2.98%
5
Town of Campo
103
2.87%
6
Town of Two Buttes
40
1.12%
U
unincorporated area
1,307
36.46%
57
Sedgwick County
2,303
0.04%
1
Town of Julesburg
1,180
51.24%
2
Town of Ovid
308
13.37%
3
Town of Sedgwick
140
6.08%
U
unincorporated area
675
29.31%
58
Dolores County
2,074
0.04%
1
Town of Dove Creek
630
30.38%
2
Town of Rico
232
11.19%
U
unincorporated area
1,212
58.44%
59
Cheyenne County
1,876
0.03%
1
Town of Cheyenne Wells
853
45.47%
2
Town of Kit Carson
238
12.69%
U
unincorporated area
785
41.84%
60
Jackson County
1,399
0.02%
1
Town of Walden
600
42.89%
U
unincorporated area
799
57.11%
61
Kiowa County
1,383
0.02%
1
Town of Eads
592
42.81%
2
Town of Sheridan Lake
82
5.93%
3
Town of Haswell
67
4.84%
U
unincorporated area
642
46.42%
62
Hinsdale County
811
0.01%
1
Town of Lake City
387
47.72%
U
unincorporated area
424
52.28%
63
Mineral County
776
0.01%
1
Town of Creede
317
40.85%
U
unincorporated area
459
59.15%
64
San Juan County
762
0.01%
1
Town of Silverton
694
91.08%
U
unincorporated area
68
8.92%