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Mary C O'Brien Elementary School

Public Grades K-6

17^th

SchoolDigger Rank ?

of 909 Arizona Elementary Schools

Better than 98% of Arizona elementary schools

Summary

Mary C O'Brien Elementary School is a public elementary school located in Casa Grande, Arizona, serving grades K-6 with a total enrollment of 122 students. The school is part of the Mary C O'Brien Accommodation District, which is ranked 9th out of 289 districts in Arizona and has a 5-star rating from SchoolDigger.

Mary C O'Brien Elementary School consistently ranks among the top elementary schools in Arizona, with a statewide ranking between 11th and 41st out of over 1,000 schools in recent years. The school has maintained a 5-star rating from SchoolDigger, indicating exceptional academic achievement. Its students consistently outperform the state averages in English Language Arts and Mathematics across all grade levels. For example, in the 2024-2025 school year, 70% of 3rd graders, 94% of 4th graders, and 81% of 6th graders were proficient or better in ELA, compared to the state averages of 36%, 46%, and 41%, respectively. Additionally, the school has a very low student-teacher ratio, ranging from 9:1 to 10.4:1 in recent years, which is significantly lower than the nearby schools and the state average.

When compared to the nearby schools, such as Legacy Traditional School - Casa Grande, Mesquite Elementary School, and The Grande Innovation, Mary C O'Brien Elementary School significantly outperforms them in academic achievement, test scores, and student-teacher ratio. This highlights the school's ability to provide a superior educational experience for its students.

123

Students ?

9.8

Student/teacher ratio ?

$22,613

Per pupil spending ?

61.7%

Free/discounted lunch ?

1400 N Eleven Mile Corner Rd
Casa Grande, AZ 85194-9187

(520) 450-4400

District: Mary C O'Brien Accommodation District

Racial breakdown:

Hispanic:

52.8%

White:

36.6%

Two or more races:

7.3%

See top rated Arizona elementary schools

Compare Mary C O'Brien Elementary School to nearby elementary schools!

At a glance

▲ Ranking trend: Improving — 85th percentile in 2013 → 98th in 2025

Strengths

✓Test scores above the Arizona average (78% vs 39% meeting standards)

✓Ranks in the top 2% of Arizona elementary schools

✓Ranking is trending up — up 13 percentile points since 2013

Worth a look

!Some student groups rank well below the school's overall statewide standing

Students meeting standards (2024-2025) ?

This school78%

District avg78%

Arizona avg39%

17^th of 909

Arizona public elementary schools ?

Top 2%▲ up 22 pts since 2016

From top 24% (2016) to top 2% (2025)

See the entire ranking list of Arizona Elementary Schools →

★★★★★

SchoolDigger rating ?

9^th of 289Mary C O'Brien Accommodation District among Arizona districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Arizona percentile	Rating
2025	96.3	17 of 909	98.1%	★★★★★
2024	97.4	11 of 912	98.8%	★★★★★
2023	95.6	41 of 1245	96.7%	★★★★★
2022	93.0	36 of 1000	96.4%	★★★★★
2021	92.7	79 of 1226	93.6%	★★★★★
2018	91.5	84 of 1109	92.4%	★★★★★
2017	89.7	96 of 1106	91.3%	★★★★★
2016	74.9	261 of 1079	75.8%	★★★★☆
2014	86.2	126 of 1079	88.3%	★★★★☆
2013	80.3	178 of 1158	84.6%	★★★★☆
2012	80.3	193 of 1141	83.1%	★★★★☆
2011	66.9	355 of 1075	67.0%	★★★☆☆
2010	73.7	280 of 1090	74.3%	★★★★☆
2009	83.3	148 of 1062	86.1%	★★★★☆

Female

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	89.0	98 of 1219	92.0%	★★★★★
2022	82.9	78 of 824	90.5%	★★★★★
2021	79.8	227 of 1219	81.4%	★★★★☆

Hispanic

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	89.2	66 of 1170	94.4%	★★★★★
2022	84.8	69 of 716	90.4%	★★★★★
2021	94.9	26 of 1198	97.8%	★★★★★
2018	96.1	19 of 911	97.9%	★★★★★

Male

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	96.9	20 of 1216	98.4%	★★★★★
2022	81.8	103 of 830	87.6%	★★★★☆
2021	95.3	35 of 1220	97.1%	★★★★★

Multi-racial

Year	Avg score	Statewide rank	Arizona percentile	Rating
2021	39.4	619 of 1027	39.7%	★★☆☆☆

Native American

Year	Avg score	Statewide rank	Arizona percentile	Rating
2021	29.6	484 of 654	26.0%	★☆☆☆☆

Pacific Islander

Year	Avg score	Statewide rank	Arizona percentile	Rating
2021	93.5	2 of 171	98.8%	★★★★★

Special Education

Year	Avg score	Statewide rank	Arizona percentile	Rating
2022	67.4	55 of 145	62.1%	★★★☆☆
2021	78.1	79 of 1201	93.4%	★★★★★

White

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	82.3	124 of 1024	87.9%	★★★★☆
2022	69.9	178 of 800	77.8%	★★★★☆
2021	94.3	8 of 1161	99.3%	★★★★★

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Pacific Islander (2021)99th percentile+5 vs school

Male (2023)98th percentile~ school

Hispanic (2023)94th percentile~ school

Female (2023)92nd percentile-5 vs school

White (2023)88th percentile-9 vs school

Special Education (2022)62nd percentile-34 vs school

Multi-racial (2021)40th percentile-54 vs school

Native American (2021)26th percentile-68 vs school

By subject vs Arizona (2024-2025) ?

English Language Arts82%+41 vs state

Mathematics75%+38 vs state

★

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Schools Near Mary C O'Brien Elementary School

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2025)				Ranking (2024)				AASA English Language Arts (2025)						AASA Mathematics (2025)						AzSCI Science (2025)		Per Pupil Expenditures (2022)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	AASA English Language Arts 3rd Grade	AASA English Language Arts 4th Grade	AASA English Language Arts 5th Grade	AASA English Language Arts 6th Grade	AASA English Language Arts 7th Grade	AASA English Language Arts 8th Grade	AASA Mathematics 3rd Grade	AASA Mathematics 4th Grade	AASA Mathematics 5th Grade	AASA Mathematics 6th Grade	AASA Mathematics 7th Grade	AASA Mathematics 8th Grade	AzSCI Science 5th Grade	AzSCI Science 8th Grade	Per Pupil Expenditures: Total	Personnel Spending from Federal Funds	Non-Personnel Spending from Federal Funds	Sub-total from Federal Funds	Personnel Spending from State and Local Funds	Non-Personnel from State and Local Funds	Sub-total Spending from State and Local Funds
Mary C O'Brien Elementary School	Public	K-6	1400 N Eleven Mile Corner Rd	Casa Grande	85194	Pinal County	Mary C O'Brien Accommodation District	No	(n/a)	No	No	(520) 450-4400	123	13	9.8		45 (36.6%)	1 (0.8%)	65 (52.8%)	0 (0.0%)	3 (2.4%)	0 (0.0%)	9 (7.3%)	96.3	17^th of 909 public elementary schools	98.1%		97.4	11^th of 912 public elementary schools	98.8%	6	70.0	94.0		81.0			76.0	81.0		69.0					$22,613	$03	$913	$920	$19,132	$2,565	$21,696
West Elementary School	Public	PK, KG-6	460 S 7th St	Coolidge	85128	Pinal County	Coolidge Unified District	No	(n/a)	No	Yes	(520) 723-2703	604	39	15.4		137 (22.7%)	61 (10.1%)	336 (55.6%)	2 (0.3%)	27 (4.5%)	1 (0.2%)	40 (6.6%)	10.1	874^th of 909 public elementary schools	3.9%		8.1	892^nd of 912 public elementary schools	2.2%	18	20.0	24.0	19.0				23.0	16.0					18.0			$00			$00
Heartland Ranch Elementary School	Public	K-6	1667 W Caroline St	Coolidge	85128	Pinal County	Coolidge Unified District	No	(n/a)	No	Yes	(520) 424-2100	545	37	14.7		102 (18.7%)	53 (9.7%)	288 (52.8%)	5 (0.9%)	39 (7.2%)	0 (0.0%)	58 (10.6%)	12.5	836^th of 909 public elementary schools	8.0%		9.5	875^th of 912 public elementary schools	4.1%	39		28.0	32.0				16.0	12.0					17.0			$00			$00
Imagine Coolidge Elementary	Public, Charter	K-5	1290 W Vah Ki Inn Rd	Coolidge	85128	Pinal County	Imagine Coolidge Elementary Inc.	Yes	(n/a)	No	Yes	(520) 723-5391	645	29	22.2		112 (17.4%)	70 (10.9%)	378 (58.6%)	7 (1.1%)	22 (3.4%)	3 (0.5%)	53 (8.2%)	50.1	385^th of 909 public elementary schools	57.6%		25.9	624^th of 912 public elementary schools	31.6%	239	40.0	43.0	43.0				57.0	44.0	52.0				27.0			$00			$00
Desert Willow Elementary School	Public	PK, KG-8	2172 N Arizola Rd	Casa Grande	85122	Pinal County	Casa Grande Elementary District	No	(n/a)	No	Yes	(520) 876-5397	505	23	21.9		145 (28.7%)	30 (5.9%)	289 (57.2%)	5 (1.0%)	13 (2.6%)	1 (0.2%)	22 (4.4%)	14.7	791^st of 909 public elementary schools	13.0%		11.5	846^th of 912 public elementary schools	7.2%	55	25.0	27.0	18.0				35.0	18.0					18.0		$7,769	$1,200	$266	$2,665	$5,291	$1,012	$6,303
Mesquite Elementary School	Public	PK, KG-8	129 N Arizola Rd	Casa Grande	85122	Pinal County	Casa Grande Elementary District	No	(n/a)	No	Yes	(520) 836-7787	439	22	19.9		82 (18.7%)	22 (5.0%)	264 (60.1%)	4 (0.9%)	41 (9.3%)	2 (0.5%)	24 (5.5%)	8	889^th of 909 public elementary schools	2.2%		10.8	860^th of 912 public elementary schools	5.7%	29	15.0	21.0					17.0	21.0							$9,356	$1,773	$257	$3,803	$5,835	$1,491	$7,326
The Grande Innovation	Public, Charter	K-8	950 N Peart Rd	Casa Grande	85122	Pinal County	The Grande Innovation Academy	Yes	(n/a)	No	Yes	(520) 381-2360	833	39	21.3		184 (22.1%)	17 (2.0%)	581 (69.7%)	4 (0.5%)	9 (1.1%)	2 (0.2%)	36 (4.3%)	27.3	591^st of 909 public elementary schools	35.0%		19.1	718^th of 912 public elementary schools	21.3%	127	29.0	45.0	26.0	41.0	40.0	61.0	27.0	24.0	28.0	33.0	17.0	33.0	27.0	45.0		$00			$00
Curiel School	Public	PK, KG-3	1000 Curiel Street	Eloy	85231	Pinal County	Eloy Elementary District	No	(n/a)	No	Yes	(520) 466-2120	204	11	18.5		18 (8.8%)	14 (6.9%)	159 (77.9%)	1 (0.5%)	5 (2.5%)	0 (0.0%)	7 (3.4%)								(n/a)															$13,029	$2,513	$663	$5,688	$7,231	$2,623	$9,854
Eloy Intermediate School	Public	1-8	1101 N. Sunshine Blvd.	Eloy	85231	Pinal County	Eloy Elementary District	No	(n/a)	No	Yes	(520) 466-2130	241	12	20.0		21 (8.7%)	23 (9.5%)	179 (74.3%)	0 (0.0%)	5 (2.1%)	2 (0.8%)	11 (4.6%)	10.1	875^th of 909 public elementary schools	3.7%		12	839^th of 912 public elementary schools	8.0%	36		25.0	23.0				19.0		15.0				17.0		$10,857	$1,877	$529	$4,283	$6,083	$2,368	$8,451
Ironwood School	Public	PK, KG-8	1500 N Colorado St	Casa Grande	85122	Pinal County	Casa Grande Elementary District	No	(n/a)	No	Yes	(520) 836-5086	481	23	20.9		70 (14.6%)	26 (5.4%)	354 (73.6%)	7 (1.5%)	3 (0.6%)	1 (0.2%)	20 (4.2%)	8.5	886^th of 909 public elementary schools	2.5%		6.3	904^th of 912 public elementary schools	0.9%	18		18.0	21.0				17.0	12.0	18.0				20.0		$8,103	$1,392	$274	$3,059	$5,719	$717	$6,436

Frequently Asked Questions about Mary C O'Brien Elementary School

What is the racial makeup of Mary C O'Brien Elementary School?

Students at Mary C O'Brien Elementary School are 53% Hispanic, 37% White, 7% Two or more races, 2% American Indian.

Is Mary C O'Brien Elementary School a good school?

Yes! Mary C O'Brien Elementary School is one of the best elementary schools in the state. It ranks 17^th of 909 Arizona elementary schools.

How many students attend Mary C O'Brien Elementary School?

In the 2024-25 school year, 123 students attended Mary C O'Brien Elementary School.

What district is Mary C O'Brien Elementary School in?

Mary C O'Brien Accommodation District

Rate Mary C O'Brien Elementary School!

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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Arizona Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.