The bulletin board for America's public schools. Parents, teachers, students, and staff. One community per school.

Jefferson County

Idaho · Public K-12

Public K-12 enrollment in Jefferson County totals about 7,578 students across 17 schools, an average of 446 per campus. Jefferson County Joint District is the largest district. By level, that breaks down as 11 elementary, 3 middle, and 3 high schools.

7-year change in Jefferson County

SY 2017-18 vs SY 2024-25
Total enrollment
7,578
+402 (+6%) vs SY 2017-18
School count
16
+1 (+7%) vs SY 2017-18
% White
85%
was 86%
% Hispanic
13%
was 12%
% Black
0%
was 0%
% Asian
0%
was 0%
Source: NCES Common Core of Data, enrollment-weighted demographic averages
Schools
17
3 districts
Enrollment
7,578
NCES CCD
Median income
$86,679
Above Idaho avg
Free/reduced lunch
32.6%
Below Idaho avg
Elementary
11
3,603 students
Middle
3
1,632 students
High
3
2,343 students
Combined / other
0
schools
LARGEST DISTRICT
JEFFERSON COUNTY JOINT DISTRICT
6,591 students · 3 districts in Jefferson County

County vs. school enrollment demographics

Left bar is the racial makeup of Jefferson 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
White
88%
Hispanic
11%
Black
0%
Asian
0%
Two or more
8%
Native American
0%
Pacific Islander
0%
School enrollment
White
85%
Hispanic
12%
Black
0%
Asian
0%
Two or more
2%
Native American
0%
Pacific Islander
0%
Bachelor's+
27.4%
adults 25+
Poverty rate
7.6%
ACS 5-year
Unemployment
2.7%
civilian labor
Median age
33
32.3% under 18

Test scores in Jefferson County

Latest 2024-25 ELA proficiency, 11 schools ranked. Idaho state average: 53.7%.

See all 11 schools in Jefferson County ranked by score →

All schools (17)

LargestA-ZTop rated
NameCityLevelGradesEnrollmentRating
RIGBY HIGH SCHOOLRigbyHigh09-122,040·
RIGBY MIDDLE SCHOOLRigbyMiddle06-08938·
COTTONWOOD ELEMENTARYRigbyElementaryKG-05682·
SOUTH FORK ELEMENTARY SCHOOLRigbyElementaryPK-05654·
FARNSWORTH MIDDLE SCHOOLRigbyMiddle06-08611·
JEFFERSON ELEMENTARY SCHOOLRigbyElementaryKG-05490·
HARWOOD ELEMENTARY SCHOOLRigbyElementaryPK-05423·
MIDWAY ELEMENTARY SCHOOLMenanElementaryPK-05372·
RIRIE ELEMENTARY SCHOOLRirieElementaryPK-06365·
TERRETON ELEMENTARY SCHOOLTerretonElementaryPK-06296·
WEST JEFFERSON HIGH SCHOOLTerretonHigh09-12204·
ROBERTS ELEMENTARY SCHOOLRobertsElementaryPK-05184·
JEFFERSON HIGH SCHOOLMenanHigh09-1299·
JEFFERSON SCHOOL DISTRICT 251 EARLY CHILDHOOD CENTERRigbyElementaryPK-PK98·
WEST JEFFERSON MIDDLE SCHOOLTerretonMiddle07-0883·
HAMER ELEMENTARY SCHOOLHamerElementaryKG-0439·
RIGBY VIRTUAL ACADEMYRigbyElementaryKG-080·

Cities in Jefferson County

Rigby9 schoolsTerreton3 schoolsMenan2 schoolsHamer1 schoolRirie1 schoolRoberts1 school

About Jefferson County

In Idaho, Jefferson County is a compact county of about 33,154 residents. 17 public schools across the county instructs about 7,578 students between them.

Zooming out, census numbers show median household income runs near $86,679, 27% of adults hold a bachelor's degree or higher, and roughly 8% of residents live below the federal poverty line. That income level is 26% higher than the Idaho median.

On the level-by-level breakdown, Jefferson County is made up of 11 elementary schools (3,603 students), 3 middle schools (1,632), and 3 high schools (2,343).

JEFFERSON COUNTY JOINT DISTRICT is the biggest district by enrollment, covering about 6,591 students across Jefferson County.

Five-year track record. Across the same 7-year window, public-school enrollment increased 6%: 7,176 students in SY 2017-18 versus 7,578 in SY 2024-25. Jefferson County now counts 16 public schools, up from 15 in SY 2017-18.

On allk12, the community for Jefferson County discusses open enrollment windows, redistricting talk, and busing logistics. Posts come from current and former families, staff, and alumni.

Frequently asked questions

How many public schools are in Jefferson County?
Jefferson County, Idaho has 17 public K-12 schools serving approximately 7,578 students.
How many high schools are in Jefferson County?
Jefferson County, Idaho has 3 public high schools, serving approximately 2,343 students.
How many middle schools are in Jefferson County?
Jefferson County, Idaho has 3 public middle schools, serving approximately 1,632 students.
How many elementary schools are in Jefferson County?
Jefferson County, Idaho has 11 public elementary schools, serving approximately 3,603 students.
What is the largest school district in Jefferson County?
JEFFERSON COUNTY JOINT DISTRICT is the largest school district in Jefferson County, serving approximately 6,591 students. The county contains 3 school districts overall.
What is the population of Jefferson County?
Jefferson County, Idaho has a population of approximately 33,154, with a median age of 33. About 32.3% of residents are under 18.
What is the median household income in Jefferson County?
Median household income in Jefferson County is $86,679, above the Idaho average of $69,041. About 7.6% of residents live below the federal poverty line.
How educated are residents of Jefferson County?
Approximately 27.4% of adults 25 and older in Jefferson County hold a bachelor's degree or higher, according to the Census ACS 5-year estimate.
What share of students in Jefferson County qualify for free or reduced lunch?
Roughly 32.6% of students in Jefferson County public schools qualify for free or reduced-price lunch, a common proxy for low-income enrollment. This is lower than the Idaho county average of 46.6%.
What is the student-teacher ratio in Jefferson County schools?
Across Jefferson County public schools, the enrollment-weighted student-teacher ratio is approximately 19.9 to 1.

Jefferson County school rankings

Largest schoolsAll rankings →
DATA · Census ACS 5-year · NCES Common Core of Data