- Enrollment
- 2,173
- Students per teacher
- 23.6:1
- Resource Index
- 21/100
High school (grades 9-12) · Rockford, IL
Guilford High School
Federal NCES profile for Guilford High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 23/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 173451003577
👥 S:T ratio 12
🌟 Gifted program 30
🎓 Counselors 26
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Guilford High School earns 23/100 on the Resource Investment Index, with class sizes larger than 97% of Illinois schools. It is also one of the largest schools in Illinois.
- #4 of 5
- high schools in Rockford · Resource Index
- 23
- Resource Index · Lower
- 21.9:1
- large classes for Illinois
- 2,216
- students enrolled
Guilford High School has class sizes larger than 97% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Guilford High School ranks #4 of 5 high schools in Rockford, IL.
School address
District: Rockford Sd 205 · Illinois
NCES ID 173451003577 Verify on NCES CCD record →
NCES CCD universe card
School universe 173451003577 · Rockford, IL High · LARGE · TRAD
2,216 enr · 21.9:1 · RII 23
Nearest enrollment peer: Jefferson High School (2,173 students)
Resource Investment Index #4 of 5 high schools in Rockford. NCES Common Core of Data stamps for this campus. Read with this school → · District book → · Illinois schools → · Find another →
Guilford High School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Guilford High School
2,216 students
- Jefferson High
Jefferson High School
2,173 students
- Auburn High Sc
Auburn High School
1,957 students
- Rockford East
Rockford East High School
1,719 students
- Rockford Envrn
Rockford Envrnmntl Science Acad
1,108 students
- Eisenhower Mid
Eisenhower Middle School
963 students
What this shows Guilford High School reports 2,216 students on the CCD universe file.
How Guilford High School compares
Guilford High School on the metrics families compare, against Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21.9:1 | ▲ 56% | 14:1 | 15.7:1 |
| Enrollment | 2,216 | top 2% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.9:1
Leaner classes than 11% of US schools, heavier class loads than most.
2,216
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
21.9:1
students per teacher
- 56% above state mean
Top 97% in Illinois - lower ratio than 3% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Funding equity
$19,016
per pupil, district-wide
- above Illinois avg of $18,196
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors6.0 FTE
Per 369 students, the combined health-and-guidance staffing load for this school.
Discipline context
12
in-school suspensions + 19 out-of-school
Suspension rate: 0.5 per 100 students. Combined in-school and out-of-school rate: 1.4 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 35.3%
African American 28.9%
Hispanic or Latino 24.5%
Two or More 7.9%
Asian 3.2%
American Indian / Alaska Native 0.1%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 35.3% of enrollment.
Student-body diversity index 72.5/100
Simpson diversity index - at 72.5, Guilford High School is more mixed than the Illinois school average of 38.9.
Programs
AP courses offered 8
Funding & spending
District-wide per-pupil expenditure for Rockford Sd 205, which includes Guilford High School.
$19,016
Per student
+5%
vs Illinois
Avg $18,196
+8%
vs U.S.
Avg $17,658
Revenue mix
Local 38.0%
State 49.1%
Federal 13.0%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2022-23 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Guilford High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Jefferson High School | Similar size | No free-lunch data | Higher S:T ratio |
| Auburn High School | Similar size | No free-lunch data | Lower S:T ratio |
| Rockford East High School | Similar size | No free-lunch data | Lower S:T ratio |
| Rockford Envrnmntl Science Acad | Smaller | No free-lunch data | Lower S:T ratio |
| Eisenhower Middle School | Smaller | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Guilford High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,957
- Students per teacher
- 20.4:1
- Resource Index
- 46/100
- Enrollment
- 1,719
- Students per teacher
- 19.1:1
- Resource Index
- 35/100
- Enrollment
- 1,108
- Students per teacher
- 15.8:1
- Resource Index
- 28/100
- Enrollment
- 963
- Students per teacher
- 20.5:1
- Resource Index
- 21/100
Similar high schools in Rockford
4 comparable high schools (grades 9-12) serving the same city.
Jefferson High School
Standard public school
2,173 students 23.6:1 students per teacher
Auburn High School
Standard public school
1,957 students 20.4:1 students per teacher
Rockford East High School
Standard public school
1,719 students 19.1:1 students per teacher
Roosevelt Center
Standard public school
60 students 1.5:1 students per teacher
Nationwide high schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~2,216 students)
Frequently asked questions about Guilford High School
How many students attend Guilford High School?
Guilford High School has 2,216 students enrolled. It is a high school in Rockford, IL.
What is the student-teacher ratio at Guilford High School?
The student-teacher ratio at Guilford High School is 21.9:1, which is 56% higher than the Illinois average of 14:1 and 39% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Guilford High School?
The largest demographic group at Guilford High School is White at 35.3% of enrollment, in Rockford, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 72.5/100.
What is the Resource Investment Index for Guilford High School?
Guilford High School has a Resource Investment Index of 23/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Guilford High School rank among high schools in Rockford?
By Resource Investment Index, Guilford High School ranks #4 of 5 high schools in Rockford, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Rockford on the city page.
What other schools are in Rockford Sd 205?
Besides Guilford High School, Rockford Sd 205 also operates Jefferson High School (2,173 students), Auburn High School (1,957 students), and Rockford East High School (1,719 students). See the Rockford Sd 205 district page for the complete list.
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error. Data current as of August 2026.