At a glance
Reported students
228
NCES CCD 2024–25
Teachers (FTE)
26.7
NCES CCD 2024–25
Student–teacher ratio
8.5:1
Calculated; not a class-size measure
Grades served
PK–05
NCES preliminary directory 2025–26
School benchmarks
Illinois elementary enrollment
19th percentile
Compared with 2,323 same-level schools reporting enrollment.
District median enrollment
269
Costello School: 228 reported students.
State peer staffing position
4th percentile
8.5:1 reported; state peer median 13.1:1. Ratio is not class size.
Historical enrollment and staffing · CRDC 2021–22
These older figures are kept separate from 2024–25 statistics and benchmarks. Differences between years can reflect changes in enrollment, staffing, or reporting scope.
- Students
- 260
- Teachers (FTE)
- 32
- Student–teacher ratio
- 8.1:1
What the reported data says about Costello School
Costello School is a public elementary school serving grades PK–05 in Lyons. It is one of 6 current school records connected to Lyons SD 103. NCES reports 228 students for 2024–25.
Among 2,323 elementary schools in Illinois with comparable records, this school is smaller than the reported median of 365 students. Its enrollment is at approximately the 19th percentile for that peer group. Size describes the campus, not instructional quality.
The reported student–teacher ratio is 8.5:1, below the Illinois median of 13.1:1 for the same school level. This ratio uses total enrollment and teacher FTE; it is not an average classroom headcount and can be affected by special programs or part-time staffing.
The largest reported race and ethnicity groups are Hispanic or Latino (83.8%) and White (9.2%). English learners represent 34.2% of enrollment. Students served under IDEA represent 16.2%. These figures help families understand who the school serves; they are not rating inputs.
Questions worth asking Costello School
- 1How do the reported 8.5:1 student–teacher ratio and 26.7 teacher FTE translate into actual class sizes by grade?
- 2Which advanced, gifted, career, arts, and computer-science courses are available this year, and how do students qualify?
- 3What counseling support is available today? The school reported 0 counselor FTE in 2021–22.
- 4Does community eligibility provide breakfast and lunch to every enrolled student, and are summer meals available?
Enrollment needs
- English learners
- 34.2%
- Students with disabilities
- 16.2%
- Free/reduced-price lunch
- 74.1%
- Lunch program
- Yes under Community Eligibility Option (CEO)
Reported support staff
- Counselors (FTE)
- 0
- Nurses (FTE)
- 0
- Psychologists (FTE)
- 0
- Social workers (FTE)
- 1
CRDC 2021–22 full-time-equivalent counts; verify current assignments with the school.
Student demographics
Race and ethnicity share of reported enrollment
- White9.2%
- Hispanic83.8%
- Black3.1%
- Asian1.8%
- American Indian / Alaska Native0.4%
- Native Hawaiian / Pacific Islander0%
- Multiracial1.8%
Race/ethnicity: NCES CCD 2024–25. English learner and disability context: CRDC 2021–22. Lunch eligibility: NCES CCD 2024–25. Privacy rules can produce missing values.
Programs reported by the school
Gifted and talented
Not reported as offered
CRDC 2021–22: the AP flag records student enrollment; gifted and computer-science fields describe reported programs/classes. Confirm current courses and eligibility with the school.
Other schools in Lyons SD 103
Start with campuses at the same school level or with similar reported enrollment.
J W Robinson Jr Elem School
Elementary · Grades KG–05
251 reported students
Home Elem School
Elementary · Grades KG–05
256 reported students
Edison Elem School
Elementary · Grades PK–05
282 reported students
Lincoln Elem School
Elementary · Grades PK–05
366 reported students
Washington Middle School
Middle · Grades 06–08
659 reported students
Public schools near Costello School
Closest campuses by straight-line distance between NCES geocodes, favoring the same school level. Distance is not drive time or an attendance assignment.
| School | Grades | Students | Distance |
|---|---|---|---|
| J W Robinson Jr Elem School Elementary · Lyons SD 103 | KG–05 | 251 | 0.8 mi |
| Lincoln Elem School Elementary · Lyons SD 103 | PK–05 | 366 | 0.8 mi |
| Congress Park Elem School Elementary · La Grange SD 102 | KG–06 | 419 | 1.4 mi |
| Hollywood Elem School Elementary · Riverside SD 96 | PK–05 | 114 | 1.5 mi |
| Walsh Elem School Elementary · Summit SD 104 | KG–05 | 182 | 1.6 mi |
| Home Elem School Elementary · Lyons SD 103 | KG–05 | 256 | 1.6 mi |
Frequently asked questions about Costello School
What grades does Costello School serve?
Costello School reports grades PK–05 in the NCES 2025–26 preliminary directory. It is classified as an elementary school in Lyons SD 103.
How many students attend Costello School?
Costello School reported 228 students in the NCES 2024–25 membership file. That places it near the 19th percentile among 2,323 Illinois elementary schools reporting enrollment. The 2021–22 civil-rights collection recorded 260 students.
What is the student–teacher ratio at Costello School?
The calculated ratio is 8.5:1, based on 228 students and 26.7 full-time-equivalent classroom teachers in 2024–25. The Illinois median for the same school level is 13.1:1. A ratio is not the same as average class size.
Is Costello School a public, charter, or magnet school?
Costello School is a public school and is not a charter school. Enrollment is generally based on Lyons SD 103 attendance boundaries and transfer rules.
What share of Costello School students qualify for free or reduced-price meals?
74.1% of students were eligible for free or reduced-price lunch in 2024–25. The school participates in community eligibility, which can provide meals to every student and changes how eligibility is reported. This describes the students served and is not a quality measure.
Which school district is Costello School in?
Costello School is part of Lyons SD 103, based in Lyons, IL, which operates 6 current schools. Confirm attendance zones and enrollment rules with the district.
What public schools are near Costello School?
The closest public schools by straight-line distance include J W Robinson Jr Elem School (0.8 mi), Lincoln Elem School (0.8 mi), Congress Park Elem School (1.4 mi). Distance does not determine eligibility; attendance boundaries and program rules do.