For the 2026 school year, there are 4 public high schools serving 1,102 students in Washington County, MO.
The top-ranked public high schools in Washington County, MO are Potosi High School, Kingston High School and Citadel School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Washington County, MO public high schools have an average math proficiency score of 33% (versus the Missouri public high school average of 36%), and reading proficiency score of 49% (versus the 51% statewide average). High schools in Washington County have an average ranking of 6/10, which is in the top 50% of Missouri public high schools.
Washington County, MO public high school have a Graduation Rate of 93%, which is more than the Missouri average of 89%.
The school with highest graduation rate is Kingston High School, with ≥95% graduation rate. Read more about public school graduation rate statistics in Missouri or national school graduation rate statistics.
Minority enrollment is 4% of the student body (majority Hispanic), which is less than the Missouri public high school average of 31% (majority Black).
Best Public High Schools in Washington County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Potosi High School
(Math: 38% | Reading: 55-59%)
Rank:
Rank:
7/
Top 50%10
1 Trojan Dr
Potosi, MO 63664
(573) 438-2156
Potosi, MO 63664
(573) 438-2156
Gr: 9-12 | 673 students Student-teacher ratio: 16:1 Minority enrollment: 5%
Rank: #22.
Kingston High School
(Math: 15-19% | Reading: 50-59%)
Rank:
Rank:
5/
Bottom 50%10
10047 Diamond Rd
Cadet, MO 63630
(573) 438-4982
Cadet, MO 63630
(573) 438-4982
Gr: 9-12 | 259 students Student-teacher ratio: 17:1 Minority enrollment: 2%
Rank: #33.
Citadel School
Special Education School
(Math: <50% | Reading: <50% )
Rank:
Rank:
5/
Bottom 50%10
400 S Mine
Potosi, MO 63664
(573) 438-2472
Potosi, MO 63664
(573) 438-2472
Gr: K-12 | 4 students Student-teacher ratio: 4:1
Rank: #44.
Valley High School
(Math: 25-29% | Reading: 30-34%)
Rank:
Rank:
3/
Bottom 50%10
1 Viking Dr
Caledonia, MO 63631
(573) 779-3515
Caledonia, MO 63631
(573) 779-3515
Gr: 7-12 | 170 students Student-teacher ratio: 9:1 Minority enrollment: 2%
Frequently Asked Questions
What are the top-ranked public high schools in Washington County, MO?
The top-ranked public high schools in Washington County, MO include Potosi High School, Kingston High School and Citadel School.
How many public high schools are located in Washington County?
4 public high schools are located in Washington County.
What is the racial composition of students in Washington County?
Washington County public high schools minority enrollment is 4% of the student body (majority Hispanic), which is less than the Missouri public high schools average of 31% (majority Black).
Which public high schools in Washington County are often viewed compared to one another?
Popular comparisons of public high schools in Washington County include: Kingston High School vs. Potosi High School, Potosi High School vs. Kingston High School
Recent Articles
When “Free Public School” Still Isn’t Free
Discover the hidden costs of public school in 2026, from supplies and fees to transportation, technology, and extracurricular expenses.
What a District Budget Cut Means for Your Child's School Experience
Learn how district budget cuts can affect class sizes, programs, staffing, transportation, and your child's daily school experience in 2026.
School Closure Risk: What Parents Should Check Before Moving
Learn how parents can assess school closure risk before buying or renting in a district, using enrollment, funding, and boundary data.