Total enrollment
42,200
-5,920 (-12%) vs SY 2017-18
Boulder County
Colorado · Public K-12
Boulder County is a Colorado county whose public-school system spans 86 campuses and approximately 42,200 students. Median household income runs about $103,994. By grade band, the county runs 52 elementary, 13 middle, and 17 high schools.
7-year change in Boulder County
SY 2017-18 vs SY 2024-25School count
86
0 (0%) vs SY 2017-18
% White
60%
was 64%
% Hispanic
28%
was 25%
% Black
1%
was 1%
% Asian
5%
was 5%
Source: NCES Common Core of Data, enrollment-weighted demographic averages
Residents
328,961
all ages · ACS 5-yr
Schools
86
3 districts
Enrollment
42,200
students · NCES CCD
Median income
$103,994
Above Colorado avg
Free/reduced lunch
33.1%
Below Colorado avg
Elementary
52
18,839 students
Middle
13
6,507 students
High
17
13,955 students
Combined / other
4
2,899 students
LARGEST DISTRICT
Boulder Valley School District No. Re2
24,006 students · 3 districts in Boulder County
County vs. school enrollment demographics
Left bar is the racial makeup of Boulder County residents (Census ACS 5-year). Right bar is the enrollment-weighted makeup of public schools in the county (NCES CCD). NCES systematically under-reports Hispanic, Pacific Islander, and Native American enrollment for many schools; where the resident share is meaningful but the reported school share is zero, we mark the school bar "not reported".
County residents
School enrollment
Bachelor's+
64.2%
adults 25+
Poverty rate
3.9%
ACS 5-year
Unemployment
4.8%
civilian labor
Median age
38
17.5% under 18
Test scores in Boulder County
Latest 2024-25 ELA proficiency, 64 schools ranked. Colorado state average: 44.9%.
Top 5 schools (ELA)
- High Peaks Elementary School· 94.7%
- Summit Middle Charter School· 89.2%
- Southern Hills Middle School· 85.9%
- Bear Creek Elementary School· 85.8%
- Eisenhower Elementary School· 85.0%
Lowest 5 schools (ELA)
Cities in Boulder County
About Boulder County
In Colorado, Boulder County is a broad county of about 328,961 residents. 86 public schools across the county hosts about 42,200 students between them.
For perspective, census numbers show typical household earnings sit around $103,994, about 64% of adults have a bachelor's degree or above, and the federal-poverty share is near 4%. That income level is 34% meaningfully above the Colorado median.
For a sense of the school types, Boulder County consists of 52 elementary schools (18,839 students), 13 middle schools (6,507), 17 high schools (13,955), and 4 combined or other schools.
The largest single district in Boulder County is Boulder Valley School District No. Re2, which alone enrolls about 24,006 students.
Trend over the past 7 years. Combined enrollment now sits at 42,200 students, shrank 12% from the 48,120 reported in SY 2017-18. Demographically, the White share of enrollment contracted from 64% to 60%.
On allk12, the community for Boulder County discusses school events, board meetings, and seasonal calendars. Anyone with firsthand knowledge of these schools is welcome to weigh in.
Frequently asked questions
Boulder County school rankings
DATA · Census ACS 5-year · NCES Common Core of Data