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SCHOOL COMMUNITY·CUSD 308·NCES 173027002101

Old Post Elementary School

100 Old Post Rd, Oswego, IL 60543 · (630) 636-3400 · Kendall County
GRADES KG–05ELEMENTARY21-SUBURBREGULAR SCHOOL387 STUDENTS
Enrollment
387
Elementary
DISTRICT 529 · STATE 381
Student : Teacher
13.4:1
29 FTE teachers
DISTRICT 14.5:1 · STATE 13.9:1
Free / Reduced Lunch
31%
119 students
DISTRICT 31% · STATE 56%
Community
1
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade
Pre-K
1
Kindergarten
57
Grade 1
60
Grade 2
53
Grade 3
77
Grade 4
70
Grade 5
69
Student demographics
White
60%
DISTRICT 46% · STATE 45%
Hispanic
25%
DISTRICT 27% · STATE 29%
Black
6%
DISTRICT 11% · STATE 16%
Asian
4%
DISTRICT 10% · STATE 6%
Two+
5%
DISTRICT 5% · STATE 5%
Native American
n/r
Pacific Islander
n/r
n/r: not reliably reported by NCES for this school. Hispanic, Pacific Islander, and Native American enrollment are systematically under-reported in the source data.
Gender split
Male
51%
Female
49%

Discussions

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Test scores

IAR + ISA 2024-25 . % Proficient (Levels 4-5)
English Language Arts
61.6%
IL avg 51.0% . +20.5pp since 2023
Math
49.1%
IL avg 37.9% . +16.1pp since 2023
Source: IAR + ISA. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
53.1%
composite math + reading, all grades
Predicted
53.8%
based on IL schools with similar FRL share
Beats by
-0.7pp
below demographic expectation
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

7-year change

SY 2017-18 vs SY 2024-25
Enrollment
387
-56 (-13%) vs 2017
Student : Teacher
13.4:1
was 14.7:1
% White
60%
was 59%
% Hispanic
25%
was 22%
% Black
6%
was 5%
% Asian
4%
was 9%
Source: NCES Common Core of Data

About Old Post Elementary School

Old Post Elementary School is a primary school of medium-sized scale in Oswego, Illinois, part of CUSD 308, serveing 387 students in grades K through 5.

CUSD 308 comprises 21 schools with combined enrollment of 16,766 students; Old Post Elementary School is among them.

On demographics, Old Post Elementary School lists that the largest single group is White, at 60% of enrollment. Other groups include 25% Hispanic, 6% Black, 5% multiracial, 4% Asian.

Looking at school resources, The school lists 29 full-time-equivalent teachers, for a student-teacher ratio near 13.4:1. That tracks the state average closely. Roughly 31% of students at Old Post Elementary School qualify for free or reduced-price lunch, often used as a Title I proxy.

With demographic context factored in, Old Post Elementary School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 53.8%, the actual is 53.1%, a residual of -0.7 points.

Around the school, the surrounding county (Kendall County) shows that the typical household earns roughly $111,601 per year, about 37% of the adult population holds a bachelor's degree or above, and census figures put the poverty rate at about 5%. In all, Kendall County runs 50 public schools (combined enrollment of about 29,773 students), of which Old Post Elementary School is one.

Nearest neighbor: Long Beach Elem School, around 0.4 miles off. Counting just inside five miles, 8 other public schools cluster around Old Post Elementary School. On composite proficiency, Old Post Elementary School comes 3rd of 9 in the immediate cluster, higher than the nearby-schools average of 42.7%.

The school occupies a bedroom-community site.

Looking at the recent track record. Over the past 7-year window, the student count ticked down 13%: 443 students in 2018 compared to 387 in 2025. Asian enrollment moved from 9% to 4% across the same window. Class-load math has fell: from 14.7:1 in 2018 to 13.4:1 in 2025.

In the discussion threads here, the page collects discussion, questions, and updates around open house dates, ride-share offers, and field-trip permission slips. Contributors range from current parents to recent graduates and teachers.

Kendall County at a glance

View full county profile
Population
137,675
Census ACS
Median income
$111,601
Household, ACS
Bachelor's+
37%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
50
29,773 students

Quick facts

School name
Old Post Elementary School
District
CUSD 308
Address
100 Old Post Rd, Oswego, IL 60543
Phone
(630) 636-3400
County
Kendall County
Level
Elementary
Grade range
KG–05
Total enrollment
387
Teachers (FTE)
29
Student–teacher ratio
13.4:1
Free/Reduced lunch
119 (31%)
Locale
21-Suburb: Large
NCES ID
173027002101
Charter school
No
Virtual school
No

Related schools

Other schools in CUSD 308
Other schools in Oswego
Nearby schools

Frequently asked questions

About Old Post Elementary School
What is the total enrollment at Old Post Elementary School?
Old Post Elementary School enrolls approximately 387 students in grades KG-05.
What age range does Old Post Elementary School serve?
Old Post Elementary School serves students from grade KG through grade 05.
What is the student-teacher ratio at Old Post Elementary School?
The student-to-teacher ratio at Old Post Elementary School is approximately 13.4:1 (29 FTE teachers).
What is the racial breakdown of students at Old Post Elementary School?
At Old Post Elementary School, the student body is approximately 60% White, 25% Hispanic, 6% Black, 4% Asian, 5% Two or more.
What district is Old Post Elementary School in?
Old Post Elementary School is part of CUSD 308.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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