Union Elementary District (4277)

3834 S 91st Ave
Tolleson, AZ 85353-9394
(District boundaries shown in map)
3/
10
Bottom 50%

Top Rankings

Union Elementary District (4277) ranks among the top 20% of public school district in Arizona for:

Category
Attribute
Community Size
Largest student body (number of students) (Top 1%)
For the 2026 school year, there are 3 public elementary schools serving 1,663 students in Union Elementary District (4277). This district's average elementary testing ranking is 2/10, which is in the bottom 50% of public elementary schools in Arizona.
Public Elementary Schools in Union Elementary District (4277) have an average math proficiency score of 12% (versus the Arizona public elementary school average of 35%), and reading proficiency score of 26% (versus the 40% statewide average).
Minority enrollment is 95% of the student body (majority Hispanic), which is more than the Arizona public elementary school average of 67% (majority Hispanic).

Overview

This School District
This State (AZ)
# Schools
3 Schools
1,641 Schools
# Students
1,663 Students
760,691 Students
# Teachers
97 Teachers
33,869 Teachers
Student-Teacher Ratio
17:1
17:1

Student By Grade

District Rank

Union Elementary District (4277), which is ranked within the bottom 50% of all 601 school districts in Arizona (based off of combined math and reading proficiency testing data) for the 2022-2023 school year.
This School District
State Average (AZ)
#453 out of 618 school districts
(Bottom 50%)
12%
34%
26%
40%
15%
24%

Students by Ethnicity:

0.45
0.66
% American Indian
3%
5%
% Asian
1%
4%
% Hispanic
72%
47%
% Black
17%
6%
% White
5%
33%
% Hawaiian
1%
n/a
% Two or more races
1%
5%
All Ethnic Groups

District Revenue and Spending

The revenue/student of $10,247 in this school district is less than the state median of $11,428. The school district revenue/student has grown by 14% over four school years.
The school district's spending/student of $10,305 is less than the state median of $11,330. The school district spending/student has grown by 18% over four school years.
This School District
This State (AZ)
Total Revenue
$17 MM
$12,837 MM
Spending
$17 MM
$12,727 MM
Revenue / Student
$10,247
$11,428
Spending / Student
$10,305
$11,330

Best Union Elementary District (4277) Public Elementary Schools (2026)

School
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Hurley Ranch Elementary School
(Math: 15% | Reading: 28%)
Rank:
3/
10
Bottom 50%
8950 W Illini Rd
Tolleson, AZ 85353
(623) 478-5100
Gr: 3-8 | 666 students Student-teacher ratio: 18:1 Minority enrollment: 95%
Rank: #22.
Dos Rios Elementary School
(Math: 8% | Reading: 23%)
Rank:
2/
10
Bottom 50%
2150 S 87th Ave
Tolleson, AZ 85353
(623) 474-7004
Gr: K-8 | 649 students Student-teacher ratio: 17:1 Minority enrollment: 95%
Rank: n/an/a
3834 S 91st Ave
Tolleson, AZ 85353
(623) 478-5000
Gr: PK-2 | 348 students Student-teacher ratio: 17:1 Minority enrollment: 96%

Recent Articles

Quick Facts (2026)

  • District size: 3 schools
  • Grades: PK-08
  • Enrollment: 1,663 students
  • Student-Teacher Ratio: 17:1
  • Minority Enrollment: 95%
  • : Bottom 50% in AZ
  • : 12% (Btm 50%)
  • : 26% (Btm 50%)
  • : 15% (Btm 50%)
  • Source: National Center for Education Statistics (NCES), AZ Dept. of Education

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