Summit County Permanent Resident Population

The following table provides an overview of the distribution of the permanent resident population in Summit County. These population numbers are based on U.S. Census data and annual population estimates prepared by the State Demography Office in the Colorado Division of Local Government.
Summit County Permanent Resident Population
Area
1970
1980
1990
2000
20101
20192
Incorporated Areas

Breckenridge
548
818
1,285
2,408
4,540 4,947
Blue River
8
230
440
685
849 923
Dillon
182
337
553
802
904
985
Frisco
471
1,221
1,601
2,443
2,683
3,159
Montezuma
N/A
N/A
60
42
65
68
Silverthorne
400
989
1,768
3,196
3,887
4,867
Subtotal
1,609
3,595
5,707
9,576
12,928
14,949
             
             
Unincorporated Areas

Subtotal
1,056
5,253
7,174
13,972
15,066
16,034
Summit County Total
2,665
8,848
12,881
23,548
27,994
30,983
1The 1970 - 2010 population numbers are based on U.S. Census data.
2The 2019 population is based on the most recent population estimates published by the State Demographer.

(View a locator map (PDF), depicting the four planning basins and six incorporated towns within Summit County.)

Approximately 52% of the permanent residents in the county live in unincorporated areas (properties located outside of town boundaries). The County's Snake River Basin has become the most populated of the unincorporated areas, primarily due to the increased permanent resident population in the Summit Cove and Dillon Valley neighborhoods (currently the two largest and most densely populated neighborhoods in unincorporated Summit County). Among the incorporated towns, the permanent resident population of Breckenridge increased most dramatically from 2000-2010; however, Silverthorne's permanent resident population has increased the most significantly since 2010.

The most recent population estimate released by the State Demographer indicates that, as of July 2019, the permanent resident population of Summit County was 30,983. This represents an 11% increase in permanent residents from the 2010 Census. The State Demography Office estimates population in arrears as of July 1 of each year (e.g., the 2020 population estimate will be released by the State Demographer in July of 2021).