Enrollment
326
High
DISTRICT 360 · STATE 455
SCHOOL COMMUNITY·CASSIA COUNTY JOINT DISTRICT·NCES 160066000127
DECLO SENIOR HIGH SCHOOL
505 EAST MAIN STREET, DECLO, ID 83323 · (208) 654-2030 · Cassia County
GRADES 09–12HIGH42-RURALREGULAR SCHOOL326 STUDENTS
C+
allk12 Grade
Scored higher than 43% of Idaho public high schools
- C+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- ·Beats expectations Not available for this school, so the grade uses the other parts.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Idaho public high schools
Student : Teacher
19.4:1
17 FTE teachers
DISTRICT 15.2:1 · STATE 16.0:1
Free / Reduced Lunch
35%
114 students
DISTRICT 51% · STATE 46%
Community
0
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 92 | 28% |
| Grade 10 | 74 | 23% |
| Grade 11 | 90 | 28% |
| Grade 12 | 70 | 21% |
Student demographics
34%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 49% · STATE 44% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Test scores
ISAT 2024-25 . % ProficientEnglish Language Arts
61.4%
ID avg 53.4%
Math
30.7%
ID avg 43.5%
What this means: On the ISAT, Idaho's statewide test, about 61 of every 100 students at this school read and write at grade level and about 31 of 100 do math at grade level. Across all Idaho schools, those numbers are about 53 and 44.
Source: ISAT. All students, all grades. See all years and grades →
Schools most like DECLO SENIOR HIGH SCHOOL
| School | Students | Low-income | Proficient |
|---|---|---|---|
| DECLO SENIOR HIGH SCHOOL this school | 326 | 35.0% | N/A |
| MELBA HIGH SCHOOL MELBA | 394 | 35.0% | N/A |
| COMPASS ACADEMY IDAHO FALLS | 393 | 39.9% | N/A |
| FILER HIGH SCHOOL FILER | 500 | 34.8% | N/A |
| PRESTON HIGH SCHOOL PRESTON | 679 | 34.5% | N/A |
| OAKLEY JR/SR HIGH SCHOOL OAKLEY | 179 | 40.8% | N/A |
Matched among Idaho high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where DECLO SENIOR HIGH SCHOOL ranks
Among high schools| Measure | This school | In Idaho |
|---|---|---|
| Math proficiency ranked highest first | 30.7% | #48 of 84 |
| Reading proficiency ranked highest first | 61.4% | #41 of 97 |
| Enrollment ranked largest first | 326 | #76 of 198 |
| Students per teacher ranked fewest first | 19.4:1 | #71 of 105 |
| Diversity index ranked most diverse first | 34.1% | #60 of 105 |
| Free and reduced lunch ranked highest share first | 35.0% | #85 of 146 |
| Enrollment change since 2017-18 ranked fastest growth first | +7.9% | #24 of 44 |
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
326
+31 (+11%) vs 2020
-20% since 1990-91, when it was 409
Student : Teacher
19.4:1
was 17.4:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 326 | 16.8 | 19.4:1 | 35% (114) |
| 2023-24 | 311 | 16.6 | 18.7:1 | 24% (74) |
| 2022-23 | 298 | 18.1 | 16.4:1 | 27% (79) |
| 2020-21 | 295 | 17 | 17.4:1 | 17% (51) |
| 2017-18 | 302 | 18.8 | 16.1:1 | 29% (89) |
| 2015-16 | 303 | 17 | 17.8:1 | 30% (92) |
| 2010-11 | 280 | 19 | 14.7:1 | 28% (79) |
| 2000-01 | 347 | 21 | 16.5:1 | 24% (84) |
| 1990-91 | 409 | 20 | 20.4:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for DECLO SENIOR HIGH SCHOOL.
Since 2017-18: students up 8% (302 to 326); teachers down 11% (18.8 to 16.8).
About DECLO SENIOR HIGH SCHOOL
DECLO SENIOR HIGH SCHOOL is a high school in DECLO, Idaho, according to federal school records. Enrollment totals 326 students across grades 9 through 12. Across high schools in Idaho, the average enrollment is about 455.
In CASSIA COUNTY JOINT DISTRICT, 16 schools enroll a combined 5,484 students.
White students are 79% of those enrolled at DECLO SENIOR HIGH SCHOOL. The next largest groups are 21% Hispanic. In Cassia County overall, about 69% of residents are White. A diversity index of 34% means there is a 34% chance two randomly chosen students at DECLO SENIOR HIGH SCHOOL are from different groups.
Staffing at DECLO SENIOR HIGH SCHOOL comes to 16.8 full-time-equivalent teachers, or 19.4:1. High schools in Idaho have an average ratio of 16.0:1. On the income side, 35% of students qualify for free or reduced-price lunch. The rate at public schools in Cassia County averages 52%, higher than here.
DECLO SENIOR HIGH SCHOOL holds a C+ allk12 Grade, placing it above 43% of Idaho public high schools.
The county, Cassia County, is where the school is located. The median household earns about $70,830 a year, the share of adults with a bachelor's degree or higher is 21%, and roughly 8% of residents are in poverty. Cassia County has 17 public schools with about 5,484 students, including DECLO SENIOR HIGH SCHOOL.
DECLO JR HIGH SCHOOL, about 0.2 miles away, is the closest public school. A five-mile radius around the school includes 2 other public schools.
In the federal locale system, DECLO SENIOR HIGH SCHOOL is coded Rural: Distant, for schools in rural territory some distance from an urban area.
The school grew from 295 students in 2020-21 to 326 in 2024-25. The student-to-teacher ratio increased from 17.4:1 in 2020-21 to 19.4:1 in 2024-25.
The allk12 page for DECLO SENIOR HIGH SCHOOL lets the school community talk about athletics, class schedules, and weather closures. You can also rate the school on this page.
Cassia County at a glance
View full county profilePopulation
25,483
Census ACS
Median income
$70,830
Household, ACS
Bachelor's+
21%
Adults 25+
Poverty rate
8%
Below federal line
Schools in county
17
5,484 students
Quick facts
Related schools
Other schools in CASSIA COUNTY JOINT DISTRICT
- BURLEY SENIOR HIGH SCHOOLHigh · 1,031 students
- BURLEY JUNIOR HIGH SCHOOLMiddle · 560 students
- WHITE PINE ELEMENTARYElementary · 553 students
- JOHN V EVANS ELEMENTARYElementary · 543 students
- MOUNTAIN VIEW ELEMENTARYElementary · 471 students
- DECLO ELEMENTARY SCHOOLElementary · 453 students
Other schools in DECLO
- DECLO ELEMENTARY SCHOOLElementary · 453 students
- DECLO JR HIGH SCHOOLMiddle · 249 students
Nearby schools
- DECLO JR HIGH SCHOOL0.2 mi · 249
- DECLO ELEMENTARY SCHOOL0.2 mi · 453
- HEYBURN ELEMENTARY SCHOOL7.1 mi · 508
- ALBION ELEMENTARY SCHOOL7.5 mi · 31
- MINI-CASSIA JUVENILE DETENTION CENTER7.6 mi · 4
- MINIDOKA JUNIOR HIGH ALTERNATIVE7.7 mi · 36
Frequently asked questions
About DECLO SENIOR HIGH SCHOOLHow large is DECLO SENIOR HIGH SCHOOL?
DECLO SENIOR HIGH SCHOOL enrolls approximately 326 students in grades 09-12.
What age range does DECLO SENIOR HIGH SCHOOL serve?
DECLO SENIOR HIGH SCHOOL serves students from grade 09 through grade 12.
How many students per teacher at DECLO SENIOR HIGH SCHOOL?
Approximately 19.4:1 students per teacher at DECLO SENIOR HIGH SCHOOL.
What is the racial breakdown of students at DECLO SENIOR HIGH SCHOOL?
At DECLO SENIOR HIGH SCHOOL, the student body is approximately 79% White, 21% Hispanic, 0% Black, 0% Asian, 0% Two or more.
Who oversees DECLO SENIOR HIGH SCHOOL?
DECLO SENIOR HIGH SCHOOL is overseen by CASSIA COUNTY JOINT DISTRICT in Cassia County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.