Home > Arizona > Maricopa County

Union Elementary District (4277) School District

Item: Union Elementary District (4277) School District
Rating: 3
Author: Public School Review

3834 S 91st Ave
Tolleson, AZ 85353-9394

( shown in map)

Bottom 50%

Tel: (623) 478-5004

www.unionesd.org

Top Rankings

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

Overview

This School District

This State (AZ)

# Schools

3 Schools

840 Schools

# Students

1,663 Students

395,381 Students

# Teachers

97 Teachers

23,848 Teachers

Student-Teacher Ratio

17:1

Student By Grade

View Data

Comparison of Students By Grade Trends
Grade	Union Elementary District (4277) School District	Arizona
Pre-K	30	29
Kind	86	64
1	122	70
2	110	74

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

District Rank

Union Elementary District (4277) School District, which is ranked within the bottom 50% of all 603 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%)

View Data

Overall School District Rank Trends
Year	Union Elementary District (4277) School District
2023	#453
2022	#500
2021	#462
2019	#483
2018	#494
2017	#479
2016	#475
2015	#493
2014	#433
2013	#365
2012	#331

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

12%

34%

View Data

Math Proficiency Trends
Year	Union Elementary District (4277) School District	Arizona
2023	12%	34%
2022	13%	35%
2021	12%	32%
2019	25%	45%
2018	23%	45%
2017	23%	42%
2016	22%	39%
2015	23%	38%
2014	47%	63%
2013	52%	63%
2012	56%	63%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

26%

40%

View Data

Reading and Language Arts Proficiency Trends
Year	Union Elementary District (4277) School District	Arizona
2022	26%	40%
2021	23%	39%
2019	29%	45%
2018	23%	44%
2017	25%	42%
2016	24%	40%
2015	23%	38%
2014	67%	79%
2013	68%	78%
2012	68%	77%
2011	66%	77%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

15%

24%

Students by Ethnicity:

0.45

0.64

View Data

Comparison of Diversity Score Trends
Year	Union Elementary District (4277) School District	Arizona
2023	0.46	0.65
2022	0.45	0.65
2021	0.44	0.66
2020	0.41	0.65
2019	0.41	0.65
2018	0.40	0.65
2017	0.40	0.65
2016	0.42	0.65
2015	0.44	0.64
2014	0.46	0.64
2013	0.46	0.64
2012	0.48	0.64
2011	0.46	0.65
2010	0.46	0.64
2009	0.48	0.64
2008	0.50	0.63
2007	0.54	0.63
2006	0.59	0.63
2005	0.57	0.62
2004	0.54	0.63
2003	0.63	0.63
2002	0.48	0.62
2001	0.47	0.62
2000	0.47	0.62
1999	0.42	0.60
1998	0.39	0.59
1997	0.41	0.58
1996	0.40	0.58
1995	0.42	0.58
1994	0.34	0.57
1993	0.48	0.56
1992	0.40	0.56
1991	0.29	0.54

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

% American Indian

View Data

American Indian Student Percentage Comparison Over Years (1991-2023)
Year	Union Elementary District (4277) School District	Arizona
2023	4%	5%
2022	3%	5%
2021	3%	5%
2020	2%	6%
2019	2%	6%
2018	2%	6%
2017	2%	6%
2016	1%	5%
2015	2%	5%
2014	3%	5%
2013	2%	5%
2012	3%	5%
2011	3%	7%
2010	4%	6%
2009	2%	6%
2008	4%	5%
2007	6%	6%
2006	8%	7%
2005	10%	7%
2004	11%	8%
2003	22%	8%
2002	62%	8%
2001	64%	8%
2000	66%	8%
1999	70%	7%
1998	77%	7%
1997	78%	7%
1996	79%	7%
1995	77%	7%
1994	85%	7%
1993	75%	7%
1992	75%	8%
1991	83%	6%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

% Asian

View Data

Asian Student Percentage Comparison Over Years (2004-2023)
Year	Union Elementary District (4277) School District	Arizona
2023	1%	3%
2021	1%	3%
2020	1%	3%
2019	1%	3%
2016	1%	3%
2015	1%	3%
2014	2%	3%
2013	3%	3%
2012	3%	3%
2011	3%	3%
2010	3%	3%
2009	3%	3%
2008	5%	3%
2007	5%	3%
2006	3%	2%
2005	1%	2%
2004	1%	2%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

% Hispanic

72%

49%

View Data

Hispanic Student Percentage Comparison Over Years (1991-2023)
Year	Union Elementary District (4277) School District	Arizona
2023	71%	47%
2022	72%	47%
2021	74%	46%
2020	76%	45%
2019	76%	45%
2018	77%	45%
2017	77%	45%
2016	75%	45%
2015	73%	45%
2014	72%	44%
2013	72%	43%
2012	71%	43%
2011	72%	42%
2010	72%	41%
2009	70%	41%
2008	69%	42%
2007	66%	41%
2006	61%	39%
2005	62%	38%
2004	65%	37%
2003	55%	36%
2002	37%	35%
2001	35%	33%
2000	32%	33%
1999	30%	32%
1998	24%	31%
1997	20%	30%
1996	30%	30%
1995	30%	29%
1994	27%	28%
1993	35%	27%
1992	18%	25%
1991	14%	25%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

% Black

17%

View Data

Black Student Percentage Comparison Over Years (2003-2023)
Year	Union Elementary District (4277) School District	Arizona
2023	17%	6%
2022	16%	6%
2021	14%	6%
2020	14%	5%
2019	14%	5%
2018	12%	5%
2017	12%	5%
2016	14%	5%
2015	15%	5%
2014	14%	5%
2013	14%	5%
2012	14%	5%
2011	14%	5%
2010	14%	6%
2009	16%	6%
2008	13%	6%
2007	16%	5%
2006	16%	5%
2005	17%	5%
2004	13%	5%
2003	11%	5%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

% White

33%

View Data

White Student Percentage Comparison Over Years (1990-2023)
Year	Union Elementary District (4277) School District	Arizona
2023	6%	35%
2022	7%	35%
2021	6%	36%
2020	5%	38%
2019	5%	38%
2018	8%	38%
2017	8%	38%
2016	8%	39%
2015	8%	40%
2014	7%	41%
2013	8%	42%
2012	8%	42%
2011	8%	42%
2010	7%	44%
2009	9%	44%
2008	9%	44%
2007	7%	45%
2006	12%	47%
2005	10%	48%
2004	10%	48%
2003	12%	49%
2002	1%	50%
2001	1%	52%
2000	2%	53%
1998	1%	56%
1997	6%	57%
1995	1%	58%
1993	5%	60%
1992	7%	61%
1991	3%	65%
1990	1%	66%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

% Hawaiian

n/a

% Two or more races

View Data

Two or More Races Student Percentage Comparison Over Years (2013-2023)
Year	Union Elementary District (4277) School District	Arizona
2023	1%	4%
2022	1%	4%
2021	2%	4%
2020	2%	3%
2019	2%	3%
2018	1%	3%
2017	1%	3%
2016	1%	3%
2015	1%	2%
2014	2%	2%
2013	1%	2%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

All Ethnic Groups

District Revenue and Spending

The revenue/student of $10,247 in this school district is less than the state median of $11,421. The school district revenue/student has stayed relatively flat over four school years.

The school district's spending/student of $10,305 is less than the state median of $11,323. The school district spending/student has stayed relatively flat over four school years.

This School District

This State (AZ)

Total Revenue

$17 MM

$12,837 MM

View Data

Total Revenues Trends
Year	Union Elementary District (4277) School District	Arizona
2023	$17 MM	$4 MM
2022	$16 MM	$4 MM
2021	$17 MM	$4 MM
2020	$16 MM	$4 MM
2019	$17 MM	$4 MM
2018	$14 MM	$4 MM
2017	$15 MM	$4 MM
2016	$15 MM	$3 MM
2015	$12 MM	$3 MM
2014	$12 MM	$3 MM
2012	$10 MM	$3 MM
2011	$12 MM	$3 MM
2010	$12 MM	$3 MM
2009	$12 MM	$2 MM
2008	$16 MM	$2 MM
2007	$18 MM	$2 MM
2006	$9 MM	$2 MM
2005	$11 MM	$2 MM
2004	$5 MM	$2 MM
2003	$2 MM	$2 MM
2002	$3 MM	$2 MM
2001	$2 MM	$1 MM
2000	$1 MM	$8 MM
1999	$1 MM	$2 MM
1998	$1 MM	$2 MM
1997	$1 MM	$7 MM
1996	$1 MM	$6 MM
1995	$1 MM	$6 MM

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Spending

$17 MM

$12,727 MM

View Data

Total Expenditure Trends
Year	Union Elementary District (4277) School District	Arizona
2023	$17 MM	$4 MM
2022	$16 MM	$4 MM
2021	$17 MM	$4 MM
2020	$16 MM	$4 MM
2019	$17 MM	$4 MM
2018	$14 MM	$4 MM
2017	$15 MM	$3 MM
2016	$14 MM	$3 MM
2015	$13 MM	$2 MM
2014	$12 MM	$3 MM
2012	$12 MM	$3 MM
2011	$12 MM	$2 MM
2010	$13 MM	$2 MM
2009	$11 MM	$2 MM
2008	$12 MM	$2 MM
2007	$20 MM	$2 MM
2006	$11 MM	$2 MM
2005	$11 MM	$2 MM
2004	$5 MM	$1 MM
2003	$2 MM	$1 MM
2002	$3 MM	$1 MM
2001	$2 MM	$2 MM
2000	$1 MM	$8 MM
1999	$1 MM	$2 MM
1998	$1 MM	$2 MM
1997	$1 MM	$6 MM
1996	$1 MM	$6 MM
1995	$1 MM	$6 MM

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Revenue / Student

$10,247

$11,421

View Data

Average Revenue Per Student Trends
Year	Union Elementary District (4277) School District	Arizona
2023	$10,113	$10,782
2022	$8,911	$10,794
2021	$10,545	$11,986
2020	$8,911	$10,794
2019	$9,216	$11,173
2018	$7,288	$11,763
2017	$7,714	$10,306
2016	$7,358	$9,541
2015	$5,932	$9,449
2014	$6,276	$8,489
2012	$5,935	$9,312
2011	$6,969	$9,958
2010	$7,134	$9,449
2009	$6,701	$9,374
2008	$8,999	$9,689
2007	$12,778	$9,028
2006	$8,433	$7,988
2005	$23,268	$7,640
2004	$13,505	$7,113
2003	$10,146	$6,846
2002	$35,438	$7,000
2001	$23,793	$5,056
2000	$13,233	$26,222
1999	$10,545	$5,976
1998	$8,757	$5,422
1997	$6,142	$15,154
1995	$7,459	$5,429
1992	$9,444	$5,848

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Spending / Student

$10,305

$11,323

View Data

Average Expenditure Per Student Trends
Year	Union Elementary District (4277) School District	Arizona
2023	$10,170	$10,054
2022	$8,723	$10,562
2021	$10,605	$11,177
2020	$8,723	$10,562
2019	$9,292	$10,609
2018	$7,587	$11,165
2017	$7,560	$9,883
2016	$6,754	$8,430
2015	$6,276	$8,879
2014	$6,339	$8,678
2012	$6,728	$9,270
2011	$7,103	$9,464
2010	$7,548	$8,879
2009	$6,425	$8,323
2008	$6,543	$8,177
2007	$14,243	$7,648
2006	$10,027	$7,012
2005	$23,985	$6,644
2004	$12,169	$6,165
2003	$8,132	$5,701
2002	$36,384	$6,081
2001	$27,280	$6,763
2000	$12,836	$24,897
1999	$8,750	$6,021
1998	$7,198	$5,233
1997	$6,655	$13,894
1995	$6,303	$5,519
1992	$8,123	$5,527

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School District Data: Full School Distirct Dataset XML | Full School Distirct Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Best Union Elementary District (4277) School District Public Preschools (2025-26)

School
(Math and Reading Proficiency)

Location

Quick Facts

Rank: n/an/a

Union Elementary School

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

September 05, 2025

School Choice vs. Neighborhood Schools: Key Factors

Explore school choice vs. neighborhood schools in 2025. Learn key factors parents should weigh when deciding the best fit for their child.

September 05, 2025

Best School Match 2025: Public vs Charter vs Magnet

Compare 2025 public, charter, and magnet school options with updated data, trends, and strategies to find the best fit.

September 05, 2025

Public School Boundaries and Equity in 2025

Explore how public school boundaries shape access, equity, and opportunity for students in 2025. Learn the impact on families and education policy.

Quick Facts (2025-26)

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