Youngest Cities in Colorado.

Cities in Colorado with the youngest populations by median age.

69 cities ranked · See the national list

#	City	Population	Median Age	Population Growth
1	Boulder	106,433	28.8	-2.6%
2	Fountain	29,300	30.0	-1.2%
3	Evans	22,396	30.8	+1.4%
4	Fort Collins	170,229	30.9	+1.0%
5	Four Square Mile	23,024	31.2	—
6	Cimarron Hills	19,817	31.7	+0.4%
7	Sherrelwood	18,692	32.4	+0.8%
8	Rifle	10,570	32.4	+3.9%
9	Greeley	110,806	32.5	+5.8%
10	Federal Heights	14,125	32.8	-2.3%
11	Fort Morgan	11,605	33.5	+2.1%
12	Brighton	42,059	34.0	+13.3%
13	Golden	20,417	34.6	-0.1%
14	Thornton	144,187	34.7	+4.2%
15	Northglenn	38,014	34.8	+2.1%
16	Johnstown	18,883	34.9	+29.5%
17	Commerce City	66,445	35.0	+15.9%
18	Welby	16,197	35.0	+1.3%
19	Wellington	11,798	35.0	+9.9%
20	Denver	718,877	35.3	+3.5%
21	Aurora	394,432	35.3	+6.2%
22	Colorado Springs	487,887	35.7	+3.1%
23	Security-Widefield	37,345	35.9	-2.4%
24	Firestone	18,049	35.9	+23.0%
25	Berkley	10,789	36.0	-8.8%
26	Parker	61,783	36.2	+13.0%
27	Clifton	19,518	36.3	-4.8%
28	Glenwood Springs	10,241	36.3	+4.4%
29	Frederick	16,651	36.4	+25.6%
30	Castle Rock	79,123	36.5	+14.6%
31	Superior	13,305	36.9	+4.1%
32	Westminster	115,484	37.4	-0.4%
33	Englewood	34,129	37.4	+4.9%
34	Erie	33,808	37.6	+36.1%
35	Sterling	13,172	37.7	-5.0%
36	Lakewood	156,583	38.2	+0.6%
37	Durango	19,411	38.3	+3.4%
38	Monument	11,735	38.3	+32.9%
39	Pueblo	111,561	38.4	-1.3%
40	Broomfield	76,304	38.6	+6.8%
41	Lafayette	30,602	39.1	-0.8%
42	Berthoud	12,411	39.3	+36.4%
43	Edwards	10,785	39.8	+11.4%
44	Arvada	122,634	40.0	-1.2%
45	Longmont	99,406	40.3	+1.2%
46	Grand Junction	68,142	40.4	+9.4%
47	Columbine	25,478	40.6	+1.4%
48	Loveland	78,410	40.7	+6.6%
49	Littleton	44,710	40.8	+1.3%
50	Windsor	37,914	40.9	+34.0%
51	Pueblo West	35,681	40.9	+9.9%
52	Dakota Ridge	33,753	41.1	-1.4%
53	Highlands Ranch	102,257	41.5	-4.0%
54	Lone Tree	14,147	41.5	+7.8%
55	Fruita	13,691	41.5	+4.5%
56	Ken Caryl	33,233	41.8	-1.9%
57	Wheat Ridge	32,070	41.9	-1.0%
58	Centennial	108,201	42.0	+0.6%
59	Louisville	20,786	42.6	-3.1%
60	Gunbarrel	10,051	43.3	+2.2%
61	The Pinery	11,871	43.5	+8.6%
62	Fairmount	9,902	43.5	—
63	Castle Pines	13,388	43.6	+41.3%
64	Steamboat Springs	13,433	43.9	+2.5%
65	Cherry Creek	10,721	44.1	-11.9%
66	Greenwood Village	15,420	45.6	-2.2%
67	Cañon City	17,122	46.2	-0.5%
68	Montrose	21,044	47.0	+6.2%
69	Black Forest	15,738	48.4	+4.1%