O Fallon High School (O Fallon Twp HSD 203 SCH DIST.), Illinois - School Profile in 2023-2024 School Year

Updated on August 8, 2025.

O Fallon High School is a High in O Fallon, IL. It currently serves 2559 students (grades 09-12). The school is part of the O Fallon Twp HSD 203 School District.

Below, we provide details about the school including the population per grade, the racial demography of the student population, the racial demography of the student population per gender/sex, and the racial demography per grade level.

You can see similar information for other schools in O Fallon Twp HSD 203 School District and all schools in Illinois.

Other Details

School Type: Regular School

School Level: High

Number of Students:2559

Number of Teachers: 155

Student/Teacher Ratio: 16.51

Location Info

Location: 600 S Smiley St, O Fallon, IL 62269

Mailing Address: 600 S Smiley St, O Fallon, IL 62269-2316

Phone: (618)632-3507

Website: http://www.oths.us

Data Source: NCES.

Student Population Per Grade

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Grade	Population
Grade 10	650
Grade 11	612
Grade 12	641
Grade 9	656

Gender/Sex of O Fallon High School Student Population

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Gender	Population	Percent of Population (%)
Male	1340	52.36
Female	1219	47.64

Race/Ethnicity Demography of O Fallon High School Student Population

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	1	0.04
Asian	68	2.66
Black or African American	560	21.88
Hispanic/Latino	205	8.01
Native Hawaiian or Other Pacific Islander	3	0.12
Two or more races	221	8.64
White	1501	58.66

Male - Race/Ethnicity Demography of Student Population

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Race/Ethnicity	Population	Percent of Population (%)
Asian	33	2.46
Black or African American	300	22.39
Hispanic/Latino	102	7.61
Native Hawaiian or Other Pacific Islander	1	0.08
Two or more races	105	7.84
White	799	59.63

Female - Race/Ethnicity Demography of Student Population

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	1	0.08
Asian	35	2.87
Black or African American	260	21.33
Hispanic/Latino	103	8.45
Native Hawaiian or Other Pacific Islander	2	0.16
Two or more races	116	9.52
White	702	57.59

Race Demography Per Grade

The tables below shows the Race/Ethnicity of the student population per grade.

Grade 10 - Race/Ethnicity of Both Genders

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Race/Ethnicity	Population	Percent of Population (%)
Asian	20	3.08
Black or African American	145	22.31
Hispanic/Latino	45	6.92
Two or more races	62	9.54
White	378	58.15

Grade 11 - Race/Ethnicity of Both Genders

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Race/Ethnicity	Population	Percent of Population (%)
American Indian or Alaska Native	1	0.16
Asian	14	2.29
Black or African American	133	21.73
Hispanic/Latino	53	8.66
Native Hawaiian or Other Pacific Islander	1	0.16
Two or more races	54	8.82
White	356	58.17

Grade 12 - Race/Ethnicity of Both Genders

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Race/Ethnicity	Population	Percent of Population (%)
Asian	8	1.25
Black or African American	153	23.87
Hispanic/Latino	54	8.42
Native Hawaiian or Other Pacific Islander	1	0.16
Two or more races	52	8.11
White	373	58.19

Grade 9 - Race/Ethnicity of Both Genders

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Race/Ethnicity	Population	Percent of Population (%)
Asian	26	3.96
Black or African American	129	19.67
Hispanic/Latino	53	8.08
Native Hawaiian or Other Pacific Islander	1	0.15
Two or more races	53	8.08
White	394	60.06