1
Enrollment
758
Elementary
DISTRICT 500 · STATE 381
SCHOOL COMMUNITY·WATERTOWN·NCES 251218002001
Hosmer
1 Concord Rd, Watertown, MA 02472 · (617) 926-7740 · Middlesex County
GRADES PK–05ELEMENTARY21-SUBURBREGULAR SCHOOL758 STUDENTS
A-
allk12 Grade
Scored higher than 81% of Massachusetts public elementary schools
- B+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.
- AThree-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Massachusetts public elementary schools
Student : Teacher
10.7:1
71 FTE teachers
DISTRICT 9.5:1 · STATE 12.2:1
Free / Reduced Lunch
,
Title I proxy
Community
5
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 | 150 | 20% |
| Kindergarten | 101 | 13% |
| Grade 1 | 107 | 14% |
| Grade 2 | 112 | 15% |
| Grade 3 | 106 | 14% |
| Grade 4 | 93 | 12% |
| Grade 5 | 89 | 12% |
This year's kindergarten class (101) is 13% larger than its 5th grade class (89).
Student demographics
66%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 63% · STATE 65% · 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
School pathway
Students here typically continue to
Based on grade levels within Watertown. Attendance zones can vary; confirm enrollment with the district.
Test scores
MCAS 2024-25 . % Meeting or Exceeding ExpectationsEnglish Language Arts
50.0%
MA avg 43.8% . +18.0pp since 2016
Math
51.0%
MA avg 42.2% . +15.0pp since 2016
What this means: On the MCAS, Massachusetts's statewide test, about 50 of every 100 students at this school read and write at grade level and about 51 of 100 do math at grade level. Across all Massachusetts schools, those numbers are about 44 and 42. Reading and writing scores are up about 18 points since 2016, while math scores are up about 15 points.
MCAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 50.0% | 51.0% |
| 2023-24 | 50.0% | 56.0% |
| 2022-23 | 54.0% | 57.0% |
| 2021-22 | 42.0% | 40.0% |
| 2020-21 | 52.0% | 29.0% |
| 2018-19 | 56.0% | 51.0% |
| 2017-18 | 51.0% | 39.0% |
| 2016-17 | 32.0% | 36.0% |
% Meeting or Exceeding Expectations, all students and all tested grades.
Source: MCAS. All students, all grades. See all years and grades →
Where Hosmer ranks
Among elementary schools| Measure | This school | In Massachusetts | In Middlesex County |
|---|---|---|---|
| Math proficiency ranked highest first | 51.0% | #349 of 920 ▼ 46 | #122 of 207 ▼ 6 |
| Reading proficiency ranked highest first | 50.0% | #322 of 920 ▼ 20 | #115 of 207 ▼ 8 |
| 3-year test score change ranked biggest gain first | +9.5pp | #95 of 901 | #21 of 206 |
| Enrollment ranked largest first | 758 | #49 of 1,086 | #13 of 238 |
| Students per teacher ranked fewest first | 10.7:1 | #206 of 938 | #54 of 222 |
| Diversity index ranked most diverse first | 66.2% | #142 of 938 | #49 of 222 |
| Enrollment change since 2017-18 ranked fastest growth first | +11.0% | #111 of 317 | #23 of 77 |
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
758
+167 (+28%) vs 2020
+28% since 1990-91, when it was 591
Student : Teacher
10.7:1
was 9.1:1
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 | 758 | 70.7 | 10.7:1 | N/A |
| 2023-24 | 720 | 67.3 | 10.7:1 | N/A |
| 2022-23 | 716 | 69.5 | 10.3:1 | N/A |
| 2020-21 | 591 | 65 | 9.1:1 | N/A |
| 2017-18 | 683 | 59.1 | 11.6:1 | N/A |
| 2015-16 | 627 | 54 | 11.6:1 | N/A |
| 2010-11 | 656 | 52 | 12.6:1 | 28% (181) |
| 2000-01 | 564 | N/A | N/A | 23% (132) |
| 1990-91 | 591 | N/A | N/A | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Hosmer.
Since 2017-18: students up 11% (683 to 758); teachers up 19% (59.1 to 70.7).
About Hosmer
Hosmer is a high-enrollment elementary school found in Watertown, Massachusetts. It covers pre-K through 5, with a total enrollment of 758 students. Statewide, elementary schools in Massachusetts average about 381 students each.
A total of 5 schools make up Watertown, with 2,844 students enrolled.
Roughly 52% of students at Hosmer are White. Other groups make up 21% Hispanic, 11% multiracial, 9% Asian, and 7% Black. County-wide, 67% of Middlesex County residents are White. Pick two students at random and there is a 66% chance they belong to different racial or ethnic groups; that figure is the school's diversity index.
The school's student-to-teacher ratio is about 10.7:1, with 70.7 full-time-equivalent teachers. That is 1.4 students per teacher below the 12.2:1 average for elementary schools in Massachusetts.
Hosmer is graded A- by allk12, scoring above 81% of Massachusetts public elementary schools once test results, poverty-adjusted performance, and the recent trend are combined.
Middlesex County has about 1,638,365 residents, and the median household income is $130,847, 60% of adults hold a bachelor's degree or higher, and about 5% of residents live below the federal poverty line. Besides Hosmer, Middlesex County has 385 other public schools.
The closest public school to Hosmer is James Russell Lowell, about 1.0 miles away. Hosmer is one of several public schools in the area, with at least 8 others within five miles.
Hosmer has an NCES locale of Suburb: Large.
Hosmer's enrollment grew from 591 in 2020-21 to 758 in 2024-25. Federal data show the ratio rising from 9.1:1 to 10.7:1.
Community posts for Hosmer can cover school safety, transportation, and start times. Questions from prospective families are welcome too.
Middlesex County at a glance
View full county profilePopulation
1,638,365
Census ACS
Median income
$130,847
Household, ACS
Bachelor's+
60%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
386
215,896 students
Quick facts
Related schools
Other schools in Watertown
- Watertown HighHigh · 761 students
- Watertown MiddleMiddle · 583 students
- James Russell LowellElementary · 422 students
- CunniffElementary · 320 students
Other schools in Watertown
- Watertown HighHigh · 761 students
- Watertown MiddleMiddle · 583 students
- James Russell LowellElementary · 422 students
- CunniffElementary · 320 students
Nearby schools
- James Russell Lowell1.0 mi · 422
- Haggerty1.0 mi · 250
- Lyon High School1.2 mi · 95
- Winthrop L Chenery Upper Elementary1.2 mi · 1,023
- Underwood1.2 mi · 253
- Watertown Middle1.2 mi · 583
Frequently asked questions
About HosmerHow large is Hosmer?
Hosmer enrolls approximately 758 students in grades PK-05.
What age range does Hosmer serve?
Hosmer serves students from grade PK through grade 05.
How many students per teacher at Hosmer?
Approximately 10.7:1 students per teacher at Hosmer.
What is the student diversity at Hosmer?
Student demographics at Hosmer are roughly 52% White, 21% Hispanic, 7% Black, 9% Asian, 11% Two or more.
Is Hosmer public or private?
Hosmer is a public K-12 school, overseen by Watertown.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.