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O Fallon High School

Q: Is O Fallon High School a good school?

O Fallon High School ranks 101 st of 620 Illinois high schools. SchoolDigger rates this school 4 stars out of 5.

Public Grades 9-12

101^st

SchoolDigger Rank ?

of 620 Illinois High Schools

Better than 84% of Illinois high schools

Summary

O Fallon High School serves grades 9–12 and enrolls 2,540 students in O’Fallon, Illinois. Its 2025–2026 results were above state averages in every reported subject and grade, and it graduated 96% of students. The most important takeaway is that O Fallon’s results are consistently strong against the state, and science is its clearest strength compared with nearby schools.

O Fallon generally places second to Mascoutah High School in nearby comparisons for English language arts (ELA) and math, but leads the group in science. On the grade 11 ACT, 65% were proficient in ELA, 55% in math and 63% in science—about 15 points above state results in each subject. Its grade 9 and 10 PreACT results were also above state averages in every reported subject, by 7 to 12 points. In science, O Fallon had 62.5% proficiency on the grade 11 ACT, just above Mascoutah’s 62.3%; it also led nearby schools in grades 9 and 10. The district matched O Fallon on these reported test results. Graduation was 6 points above the state rate of 90%, though just below Mascoutah’s 98%.

Recent results are mixed: ACT math and ELA improved, and PreACT math rose by about 2 points in each grade, while PreACT ELA fell by 1 point in grade 10 and 5 points in grade 9. SchoolDigger gives O Fallon 4 stars and ranks it at the 84th percentile statewide in 2025–2026, second among nearby schools; it was at the 87th percentile in 2023–2024 and 86th in 2024–2025. Its 16.3 student-teacher ratio is among the higher ones locally. The school’s free/reduced lunch eligible rate was 28% in 2024–2025, below the nearby-school average of 49%. SchoolDigger’s statewide rankings for how effectively the school serves Multi-racial Students and Disabled Students are notably lower than its overall ranking: the groups were at the 24th and 16th percentiles, respectively, compared with 84th overall. Those group rankings had fallen from the 66th and 68th percentiles in 2023–2024.

2,540

Students ?

16.3

Student/teacher ratio ?

$14,894

Per pupil spending ?

28.1%

Free/reduced lunch eligible (2024-25) ?

98.7%

Measles protection (all grades) (2025-26)

600 S Smiley St
O Fallon, IL 62269-2316

(618) 632-3507

District: O Fallon Township HSD 203

Feeder schools for O Fallon High School:

Elementary:	Dawn Elser Elementary School
	Delores Moye Elementary School
	Estelle Kampmeyer Elementary School
	J Emmett Hinchcliffe Senior Elementary School
	More...
	Laverna Evans Elementary School
	Marie Schaefer Elementary School
	Shiloh Elementary School
Middle:	Amelia V Carriel Junior High
	Fulton Junior High School
	Joseph Arthur Middle School
	Shiloh Middle School

Racial breakdown:

White:

59.0%

African American:

20.4%

Two or more races:

9.4%

See top rated Illinois high schools

Compare O Fallon High School to nearby high schools!

At a glance

▼ Ranking trend: Declining — 96th percentile in 2016 → 84th in 2026

Strengths

✓Test scores above the Illinois average (59% vs 47% meeting standards)

✓Ranks in the top 16% of Illinois high schools

✓96% graduate in 4 years — above the Illinois average (90%)

Worth a look

!Ranking has slipped — down 12 percentile points since 2016

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

Students meeting standards (2025-2026) ?

This school59%

District avg59%

Illinois avg47%

101^st of 620

Illinois public high schools ?

Top 16%▼ down 12 pts since 2016

From top 4% (2016) to top 16% (2026)

See the entire ranking list of Illinois High Schools →

★★★★★

SchoolDigger rating ?

105^th of 738O Fallon Township HSD 203 among Illinois 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	Illinois percentile	Rating
2026	78.8	101 of 620	83.7%	★★★★☆
2025	81.6	101 of 698	85.5%	★★★★☆
2024	84.7	91 of 697	86.9%	★★★★☆
2023	82.6	99 of 699	85.8%	★★★★☆
2022	83.4	97 of 699	86.1%	★★★★☆
2021	78.9	118 of 688	82.8%	★★★★☆
2019	93.1	44 of 701	93.7%	★★★★★
2018	88.7	58 of 647	91.0%	★★★★★
2017	90.1	51 of 642	92.1%	★★★★★
2016	86.2	28 of 643	95.6%	★★★★★
2015	88.6	49 of 614	92.0%	★★★★★
2014	88.3	58 of 670	91.3%	★★★★★
2013	88.8	53 of 670	92.1%	★★★★★
2012	91.9	36 of 665	94.6%	★★★★★
2011	88.0	59 of 655	91.0%	★★★★★
2010	86.9	58 of 643	91.0%	★★★★★
2009	87.7	53 of 632	91.6%	★★★★★
2008	88.2	48 of 624	92.3%	★★★★★
2007	86.6	51 of 612	91.7%	★★★★★
2006	83.2	77 of 596	87.1%	★★★★☆
2005	88.9	34 of 590	94.2%	★★★★★
2004	90.3	29 of 592	95.1%	★★★★★
2003	81.5	78 of 586	86.7%	★★★★☆

African American

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	51.7	71 of 187	62.0%	★★★☆☆
2025	66.9	83 of 323	74.3%	★★★★☆
2024	52.2	92 of 299	69.2%	★★★☆☆
2023	70.4	48 of 301	84.1%	★★★★☆
2022	70.2	50 of 294	83.0%	★★★★☆
2021	60.3	64 of 281	77.2%	★★★★☆
2019	73.2	49 of 299	83.6%	★★★★☆
2018	71.1	43 of 253	83.0%	★★★★☆

Asian

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	45.2	72 of 124	41.9%	★★☆☆☆
2025	48.5	94 of 148	36.5%	★★☆☆☆
2024	48.7	73 of 137	46.7%	★★☆☆☆
2022	74.9	35 of 141	75.2%	★★★★☆
2019	82.5	20 of 130	84.6%	★★★★☆
2018	66.5	45 of 132	65.9%	★★★☆☆

Disabled

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	16.8	98 of 117	16.2%	★☆☆☆☆
2025	51.1	163 of 491	66.8%	★★★☆☆
2024	50.0	137 of 429	68.1%	★★★☆☆
2023	71.4	66 of 428	84.6%	★★★★☆

English Language Learner

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	60.6	77 of 284	72.9%	★★★★☆

Female

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	75.0	116 of 545	78.7%	★★★★☆
2025	81.3	98 of 685	85.7%	★★★★☆
2024	87.8	77 of 664	88.4%	★★★★☆
2023	80.9	102 of 656	84.5%	★★★★☆
2022	84.0	86 of 658	86.9%	★★★★☆
2021	73.5	142 of 639	77.8%	★★★★☆
2019	91.8	45 of 665	93.2%	★★★★★
2018	86.2	58 of 620	90.6%	★★★★★

Hispanic

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	79.7	41 of 268	84.7%	★★★★☆
2025	82.1	47 of 366	87.2%	★★★★☆
2024	95.1	20 of 336	94.0%	★★★★★
2023	89.2	27 of 333	91.9%	★★★★★
2022	82.4	41 of 335	87.8%	★★★★☆
2021	82.4	38 of 317	88.0%	★★★★☆
2019	89.8	25 of 317	92.1%	★★★★★
2018	94.5	14 of 291	95.2%	★★★★★

Low Socio Economic Status

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	50.8	224 of 478	53.1%	★★★☆☆
2025	61.2	210 of 672	68.8%	★★★☆☆
2024	54.6	237 of 639	62.9%	★★★☆☆
2023	64.3	174 of 644	73.0%	★★★★☆
2022	50.9	275 of 626	56.1%	★★★☆☆
2021	50.6	244 of 611	60.1%	★★★☆☆
2019	79.5	68 of 639	89.4%	★★★★☆
2018	82.1	45 of 585	92.3%	★★★★★

Male

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	73.0	110 of 521	78.9%	★★★★☆
2025	78.5	110 of 685	83.9%	★★★★☆
2024	78.4	118 of 668	82.3%	★★★★☆
2023	81.4	99 of 668	85.2%	★★★★☆
2022	79.9	104 of 664	84.3%	★★★★☆
2021	80.0	102 of 653	84.4%	★★★★☆
2019	92.4	45 of 675	93.3%	★★★★★
2018	88.0	58 of 619	90.6%	★★★★★

Military Connected

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	85.2	3 of 25	88.0%	★★★★★
2024	87.8	3 of 23	87.0%	★★★★★
2023	89.9	4 of 22	81.8%	★★★★☆
2022	90.6	2 of 26	92.3%	★★★★★
2021	89.5	4 of 22	81.8%	★★★★☆
2019	91.5	3 of 19	84.2%	★★★★☆

Multi-racial

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	24.8	99 of 130	23.8%	★☆☆☆☆
2025	54.8	89 of 211	57.8%	★★★☆☆
2024	61.9	61 of 182	66.5%	★★★☆☆
2023	54.7	66 of 163	59.5%	★★★☆☆
2022	58.2	68 of 170	60.0%	★★★☆☆
2021	32.6	100 of 160	37.5%	★★☆☆☆
2019	65.7	55 of 165	66.7%	★★★☆☆
2018	66.5	52 of 154	66.2%	★★★☆☆

Special Education

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	36.7	135 of 238	43.3%	★★☆☆☆
2025	33.0	306 of 527	41.9%	★★☆☆☆
2024	30.9	292 of 482	39.4%	★★☆☆☆
2023	41.3	215 of 476	54.8%	★★★☆☆
2022	40.7	220 of 493	55.4%	★★★☆☆
2021	47.5	159 of 453	64.9%	★★★☆☆
2019	45.3	166 of 473	64.9%	★★★☆☆
2018	57.4	94 of 374	74.9%	★★★★☆

White

Year	Avg score	Statewide rank	Illinois percentile	Rating
2026	80.6	72 of 515	86.0%	★★★★☆
2025	82.4	83 of 564	85.3%	★★★★☆
2024	85.4	73 of 554	86.8%	★★★★☆
2023	82.6	72 of 557	87.1%	★★★★☆
2022	85.0	69 of 560	87.7%	★★★★☆
2021	80.8	90 of 553	83.7%	★★★★☆
2019	94.5	30 of 552	94.6%	★★★★★
2018	89.4	48 of 548	91.2%	★★★★★

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)

Military Connected (2025)88th percentile~ school

White (2026)86th percentile~ school

Hispanic (2026)85th percentile~ school

Male (2026)79th percentile-5 vs school

Female (2026)79th percentile-5 vs school

English Language Learner (2025)73rd percentile-13 vs school

African American (2026)62nd percentile-22 vs school

Low Socio Economic Status (2026)53rd percentile-31 vs school

Special Education (2026)43rd percentile-40 vs school

Asian (2026)42nd percentile-42 vs school

Multi-racial (2026)24th percentile-60 vs school

Disabled (2026)16th percentile-67 vs school

By subject vs Illinois (2025-2026) ?

English Language Arts65%+15 vs state

Science62%+15 vs state

Mathematics55%+15 vs state

5.0

1 rating · 1 written review

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What people are saying

by a parent
Tuesday, January 15, 2019

I am a former student and now have children in the school district. OFallon is by far the best district in the area Close Quote

Schools Near O Fallon High School

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Ranking:

E Elementary M Middle H High A Alternative P Private

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

School													Students/Teachers											Ranking (2026)				Ranking (2025)				PreACT Secure English Language Arts (2026)		PreACT Secure Mathematics (2026)		PreACT Secure Science (2026)		ACT English Language Arts (2026)	ACT Mathematics (2026)	ACT Science (2026)	ISA Science (2026)	IAR English Language Arts (2026)				IAR Mathematics (2026)				Vaccination (2025-26)		Per Pupil Expenditures (2026)
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/reduced lunch (2024-25)	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2026)	Statewide Rank (2026)	State Percentile (2026)	SchoolDigger Rating (2026)	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	Rank Change from Previous Year	PreACT Secure English Language Arts 9th Grade	PreACT Secure English Language Arts 10th Grade	PreACT Secure Mathematics 9th Grade	PreACT Secure Mathematics 10th Grade	PreACT Secure Science 9th Grade	PreACT Secure Science 10th Grade	ACT English Language Arts 11th Grade	ACT Mathematics 11th Grade	ACT Science 11th Grade	ISA Science 8th Grade	IAR English Language Arts 6th Grade	IAR English Language Arts 7th Grade	IAR English Language Arts 8th Grade	IAR English Language Arts All Grades	IAR Mathematics 6th Grade	IAR Mathematics 7th Grade	IAR Mathematics 8th Grade	IAR Mathematics All Grades	Vaccination: Measles protection (all grades)	Vaccination: Exemption rate	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
O Fallon High School	Public	9-12	600 S Smiley St	O Fallon	62269	St. Clair County	O Fallon Township HSD 203	No	(n/a)	No	Yes	(618) 632-3507	2,540	156	16.3	28.1%	1,499 (59.0%)	518 (20.4%)	205 (8.1%)	63 (2.5%)	2 (0.1%)	1 (0.0%)	239 (9.4%)	78.8	101^st of 620 public high schools	83.7%		81.6	101^st of 698 public high schools	85.5%		69.9	66.0	49.4	47.8	56.3	60.3	65.0	54.8	62.5										98.7%		$14,894	$707	$14,187
Lebanon High School	Public	6-12	200 W Schuetz St	Lebanon	62254	St. Clair County	Lebanon CUSD 9	No	(n/a)	No	Yes	(618) 537-4423	218	24	9.0	39.9%	158 (72.5%)	35 (16.1%)	11 (5.0%)	2 (0.9%)	1 (0.5%)	1 (0.5%)	10 (4.6%)	45.8	327^th of 620 public high schools	47.3%		41	430^th of 698 public high schools	38.4%	103	61.1	45.5	30.6		41.7	47.6	44.1		47.1	52.0	54.0	59.4	84.0	62.6	28.0			28.0	98.3%		$19,149	$1,708	$17,441
Belleville High School-East	Public	9-12	2555 West Blvd	Belleville	62221	St. Clair County	Belleville Township HSD 201	No	(n/a)	No	Yes	(618) 222-3706	2,600	153	16.9	55.6%	933 (35.9%)	1,292 (49.7%)	127 (4.9%)	45 (1.7%)	9 (0.3%)	5 (0.2%)	189 (7.3%)	44.8	339^th of 620 public high schools	45.3%		50.3	342^nd of 698 public high schools	51.0%	3	63.8	49.5	38.1	29.1	42.4	39.7	45.0	33.6	41.9										99.1%		$21,708	$733	$20,975
Saint Clair County ROE Safe School	Public	5-12	1722 W Main St	Belleville	62226	St. Clair County	Saint Clair ROE	No	(n/a)	No	(n/a)	(618) 233-6874	0	6	.0	—	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)
Collinsville High School	Public	9-12	2201 S Morrison Ave	Collinsville	62234	St. Clair County	Collinsville CUSD 10	No	(n/a)	No	No	(618) 343-6140	1,956	132	14.8	66.3%	1,028 (52.6%)	271 (13.9%)	539 (27.6%)	7 (0.4%)	1 (0.1%)	2 (0.1%)	108 (5.5%)	29.9	453^rd of 620 public high schools	26.9%		41.8	423^rd of 698 public high schools	39.4%	30	48.1	40.5	28.5	26.5	38.1	38.3	38.4	26.0	36.0										99.1%		$15,931	$1,018	$14,913
Collinsville Area Career Center	Public	11-12	2201 S Morrison Ave	Collinsville	62234	St. Clair County	Madison ROE	No	(n/a)	No	(n/a)	(618) 343-6141	0	0		—	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)
Mascoutah High School	Public	9-12	1313 W Main St	Mascoutah	62258	St. Clair County	Mascoutah CUD 19	No	(n/a)	No	No	(618) 566-8523	1,243	80	15.5	21.8%	821 (66.0%)	130 (10.5%)	127 (10.2%)	26 (2.1%)	4 (0.3%)	4 (0.3%)	121 (9.7%)	80.5	91^st of 620 public high schools	85.3%		80.6	108^th of 698 public high schools	84.5%	17	72.9	71.1	53.6	44.4	53.4	56.7	71.7	59.6	62.3										99%		$15,071	$968	$14,103
Saint Clair County Juvenile Detention Center	Public	7-12	9006 Lebanon Rd	Belleville	62223	St. Clair County	East St Louis School District 189	No	(n/a)	No	(n/a)	(618) 397-0766	0	0	.0	—	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)
Bridges Networking Connections - Intermediate	Public	12	5950 Town Hall Rd	Belleville	62223	St. Clair County	Belleville Township HSD 201	No	(n/a)	(n/a)	(n/a)	(618) 222-8273	0			—	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)
Bridges Networking Connections	Public	12	5950 Town Hall Rd	Belleville	62223	St. Clair County	Belleville Township HSD 201	No	(n/a)	(n/a)	(n/a)	(618) 222-8273	0			—	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)

Frequently Asked Questions about O Fallon High School

How many students attend O Fallon High School?

In the 2024-25 school year, 2,540 students attended O Fallon High School.

What schools feed into O Fallon High School?

O Fallon High School is fed by the following schools:

Elementary : Dawn Elser Elementary School
Elementary : Delores Moye Elementary School
Elementary : Estelle Kampmeyer Elementary School
Elementary : J Emmett Hinchcliffe Senior Elementary School
Elementary : Laverna Evans Elementary School
Elementary : Marie Schaefer Elementary School
Elementary : Shiloh Elementary School
Middle : Amelia V Carriel Junior High
Middle : Fulton Junior High School
Middle : Joseph Arthur Middle School
Middle : Shiloh Middle School

What is the racial makeup of O Fallon High School?

Students at O Fallon High School are 59% White, 20% African American, 9% Two or more races, 8% Hispanic, 2% Asian.

Is O Fallon High School a good school?

O Fallon High School ranks 101^st of 620 Illinois high schools. SchoolDigger rates this school 4 stars out of 5.

What district is O Fallon High School in?

O Fallon Township HSD 203

Rate O Fallon High School!

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Latest Illinois data All new data »

2025–26 school spending dataOct 30, 2026

2025–26 attendance data, dropout rates & graduation ratesOct 30, 2026

2025–26 ACT, IAR, ISA & PreACT Secure test scoresOct 30, 2026

2013–14 through 2025–26 immunization rates (updated)Oct 19, 2026

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau, the Illinois Department of Public Health and the Illinois State Board 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.