Enrollment
241
Elementary
DISTRICT 463 · STATE 381
SCHOOL COMMUNITY·CHICAGO PUBLIC SCHOOLS DIST 299·NCES 170993000944
Mason Elementary School
4217 W 18th St, Chicago, IL 60623 · (773) 534-1530 · Cook County
GRADES PK–08ELEMENTARY11-CITYTITLE IREGULAR SCHOOL241 STUDENTS
Student : Teacher
11.9:1
20 FTE teachers
DISTRICT 14.6:1 · STATE 13.9:1
Free / Reduced Lunch
95%
229 students
DISTRICT 78% · STATE 56%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Pre-K | 28 | 12% |
| Kindergarten | 25 | 10% |
| Grade 1 | 22 | 9% |
| Grade 2 | 18 | 7% |
| Grade 3 | 31 | 13% |
| Grade 4 | 23 | 10% |
| Grade 5 | 23 | 10% |
| Grade 6 | 30 | 12% |
| Grade 7 | 14 | 6% |
| Grade 8 | 26 | 11% |
| Grade 12 | 1 | 0% |
This year's kindergarten class (25) is about the same size as its 8th grade class (26).
Student demographics
30%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 64% · STATE 69% · 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
IAR + ISA 2024-25 . % Proficient (Levels 4-5)English Language Arts
19.0%
IL avg 51.0% . +12.2pp since 2023
Math
6.3%
IL avg 37.9% . +1.5pp since 2023
What this means: On the IAR + ISA, Illinois's statewide test, about 19 of every 100 students at this school read and write at grade level and about 6 of 100 do math at grade level. Across all Illinois schools, those numbers are about 51 and 38. Reading and writing scores are up about 12 points since 2023, while math scores are up about 2 points.
IAR + ISA results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 19.0% | 6.3% |
| 2023-24 | 6.8% | 4.8% |
% Proficient (Levels 4-5), all students and all tested grades.
Source: IAR + ISA. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
11.3%
composite math + reading, all grades
Predicted
16.6%
based on IL schools with similar FRL share
Beats by
-5.3pp
below demographic expectation
What this means: About 11% of students here test proficient in math and reading, compared with the roughly 17% typical for Illinois schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Illinois's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Mason Elementary School
Mason Elementary School's state test result (11.3% proficient) is higher than 1 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Mason Elementary School this school | 241 | 95.0% | 11.3% |
| Bond Elementary School Chicago | 233 | 95.7% | 12.1% |
| Madison Elementary School Chicago | 224 | 97.3% | 20.0% |
| Joplin Elementary School Chicago | 283 | 96.1% | 28.0% |
| Hendricks Elementary Community Academy Chicago | 217 | 97.2% | 10.5% |
| Dewey Elementary Academy of Fine Arts Chicago | 272 | 96.0% | 31.7% |
Matched among Illinois elementary 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 Mason Elementary School ranks
Among elementary schools| Measure | This school | In Illinois | In Cook County |
|---|---|---|---|
| State test proficiency ranked highest first | 11.3% | #1,853 of 1,925 | #723 of 760 |
| Math proficiency ranked highest first | 6.3% | #2,005 of 2,077 ▼ 128 | #778 of 829 ▼ 77 |
| Reading proficiency ranked highest first | 19.0% | #1,942 of 2,077 ▲ 75 | #770 of 829 ▲ 40 |
| Enrollment ranked largest first | 241 | #1,874 of 2,419 | #763 of 901 |
| Students per teacher ranked fewest first | 11.9:1 | #517 of 2,035 | #269 of 817 |
| Diversity index ranked most diverse first | 30.3% | #1,393 of 2,042 | #520 of 819 |
| Free and reduced lunch ranked highest share first | 95.0% | #155 of 2,132 | #117 of 804 |
| Enrollment change since 2017-18 ranked steepest decline first | -36.4% | #86 of 1,461 | #57 of 661 |
Ranked against other public elementary 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
241
-64 (-21%) vs 2020
-84% since 1990-91, when it was 1,553
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 | 241 | 20.3 | 11.9:1 | 95% (229) |
| 2023-24 | 242 | N/A | N/A | 98% (236) |
| 2022-23 | 221 | 1 | 221.0:1 | 96% (213) |
| 2020-21 | 305 | N/A | N/A | N/A |
| 2017-18 | 379 | N/A | N/A | 99% (376) |
| 2015-16 | 381 | N/A | N/A | 99% (378) |
| 2010-11 | 531 | 24 | 22.1:1 | 99% (528) |
| 2000-01 | 1,437 | 71 | 20.2:1 | N/A |
| 1990-91 | 1,553 | 81 | 19.2:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Mason Elementary School.
About Mason Elementary School
Mason Elementary School serves students in Chicago, Illinois, as a small elementary school. It educates 241 students in pre-K through 8. The typical figure for elementary schools in Illinois is about 381 students.
Chicago Public Schools Dist 299 has 324,396 students spread across 622 schools.
About 82% of the student body at Mason Elementary School is Black. Smaller groups are 17% Hispanic. County-wide, 22% of Cook County residents are Black. The school's diversity index is 30%, meaning two students picked at random have a 30% chance of belonging to different racial or ethnic groups.
The school reported 20.3 full-time-equivalent teachers in 2024-25 and a ratio of 11.9:1. That is 2.0 students per teacher below the 13.9:1 average for elementary schools in Illinois. Free or reduced-price lunch eligibility is 95%. The gap from the 66% average for public schools in Cook County is 29 points.
The BeatsExpectations prediction for Mason Elementary School is 16.6%, and its average proficiency rate on state tests is 11.3%.
Census Bureau estimates for Cook County show that the median household income is $83,498, 43% of adults hold a bachelor's degree or higher, and about 10% of people live in poverty. Mason Elementary School is one of 1,406 public schools in the county.
The closest public school, Hughes C Elementary School, is about 0.3 miles from Mason Elementary School. Other public schools within five miles: at least 8. The average proficiency across nearby scored schools is 12.1%; Mason Elementary School's is 11.3%, ranking 5th of 9.
The school's federal locale classification is City: Large.
Compared with 2020-21, the school had 64 fewer students in 2024-25.
Discussions about Mason Elementary School may include science fairs, picture day, and bus routes. Alumni can share how the school prepared them.
Cook County at a glance
View full county profilePopulation
5,182,090
Census ACS
Median income
$83,498
Household, ACS
Bachelor's+
43%
Adults 25+
Poverty rate
10%
Below federal line
Schools in county
1,406
697,934 students
Quick facts
Related schools
Other schools in Chicago Public Schools Dist 299
- Lane Technical High SchoolHigh · 4,604 students
- Taft High SchoolHigh · 4,487 students
- Curie Metropolitan High SchoolHigh · 3,099 students
- Kenwood Academy High SchoolHigh · 2,268 students
- Young Magnet High SchoolHigh · 2,223 students
- Lincoln Park High SchoolHigh · 2,214 students
Other schools in Chicago
- Lane Technical High SchoolHigh · 4,604 students
- Taft High SchoolHigh · 4,487 students
- Curie Metropolitan High SchoolHigh · 3,099 students
- Kenwood Academy High SchoolHigh · 2,268 students
- Young Magnet High SchoolHigh · 2,223 students
- Lincoln Park High SchoolHigh · 2,214 students
Other Mason Elementary schools
8 other US public schools in 8 states are named Mason Elementary. Mason Elementary School is the 6th largest of the 9.
- Mason Elementary SchoolDuluth, GA · 913 students
- Mason ElementarySan Diego, CA · 538 students
- MASON ELEM.LEE'S SUMMIT, MO · 512 students
- MASON ELEM.ST LOUIS, MO · 393 students
- Mason Elementary SchoolMASON, TX · 298 students
Nearby schools
- Hughes C Elementary School0.3 mi · 169
- Penn Elementary School0.5 mi · 218
- KIPP Chicago Chrtrs - Ascend Academy0.5 mi · 897
- YCCS-CCA Academy High School0.7 mi · 124
- Corkery Elementary School0.7 mi · 442
- Herzl Elementary School0.7 mi · 429
Frequently asked questions
About Mason Elementary SchoolHow many students attend Mason Elementary School?
Mason Elementary School enrolls approximately 241 students in grades PK-08.
What grades does Mason Elementary School serve?
Mason Elementary School serves grades PK-08.
How many students per teacher at Mason Elementary School?
Approximately 11.9:1 students per teacher at Mason Elementary School.
How diverse is Mason Elementary School?
Mason Elementary School reports a student body of 1% White, 17% Hispanic, 82% Black.
Who oversees Mason Elementary School?
Mason Elementary School is overseen by Chicago Public Schools Dist 299 in Cook County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.