For the 2026 school year, there are 12 public schools serving 3,356 students in Washington County, MO (there are 1 private school, serving 68 private students). 98% of all K-12 students in Washington County, MO are educated in public schools (compared to the MO state average of 88%).
The top-ranked public schools in Washington County, MO are Potosi Elementary School, Kingston Elementary School and Trojan Intermediate. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Washington County, MO public schools have an average math proficiency score of 42% (versus the Missouri public school average of 41%), and reading proficiency score of 51% (versus the 43% statewide average). Schools in Washington County have an average ranking of 9/10, which is in the top 20% of Missouri public schools.
Minority enrollment is 4% of the student body (majority Hispanic), which is less than the Missouri public school average of 33% (majority Black).
Best Public Schools in Washington County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Potosi Elementary School
(Math: 55-59% | Reading: 55-59%)
Rank:
Rank:
9/
Top 20%10
205 State Hwy P
Potosi, MO 63664
(573) 438-2223
Potosi, MO 63664
(573) 438-2223
Gr: PK-3 | 683 students Student-teacher ratio: 13:1 Minority enrollment: 3%
Rank: #22.
Kingston Elementary School
(Math: 50-54% | Reading: 60-64%)
Rank:
Rank:
9/
Top 20%10
10047 Diamond Rd
Cadet, MO 63630
(573) 438-4982
Cadet, MO 63630
(573) 438-4982
Gr: 3-5 | 174 students Student-teacher ratio: 11:1 Minority enrollment: 3%
Rank: #33.
Trojan Intermediate
(Math: 53% | Reading: 58%)
Rank:
Rank:
9/
Top 20%10
367 Intermediate Dr
Potosi, MO 63664
(573) 436-8108
Potosi, MO 63664
(573) 436-8108
Gr: 4-6 | 438 students Student-teacher ratio: 12:1 Minority enrollment: 5%
Rank: #44.
John A. Evans Middle School
(Math: 42% | Reading: 52%)
Rank:
Rank:
7/
Top 50%10
303 S Lead St
Potosi, MO 63664
(573) 438-2101
Potosi, MO 63664
(573) 438-2101
Gr: 7-8 | 316 students Student-teacher ratio: 12:1 Minority enrollment: 5%
Rank: #55.
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: #66.
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: #77.
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: #88.
Caledonia Elementary School
(Math: 30-34% | Reading: 40-44%)
Rank:
Rank:
5/
Bottom 50%10
1 Viking Dr
Caledonia, MO 63631
(573) 779-3446
Caledonia, MO 63631
(573) 779-3446
Gr: PK-6 | 198 students Student-teacher ratio: 10:1 Minority enrollment: 2%
Rank: #99.
Kingston Middle School
(Math: 25-29% | Reading: 40-44%)
Rank:
Rank:
4/
Bottom 50%10
10047 Diamond Rd
Cadet, MO 63630
(573) 438-4982
Cadet, MO 63630
(573) 438-4982
Gr: 6-8 | 169 students Student-teacher ratio: 11:1 Minority enrollment: 2%
Rank: #1010.
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%
Rank: #1111.
Richwoods Elementary School
(Math: 25-29% | Reading: 25-29%)
Rank:
Rank:
2/
Bottom 50%10
10788 State Hwy A
Richwoods, MO 63071
(573) 678-2257
Richwoods, MO 63071
(573) 678-2257
Gr: PK-8 | 137 students Student-teacher ratio: 9:1 Minority enrollment: 2%
Rank: n/an/a
10047 Diamond Rd
Cadet, MO 63630
(573) 438-4982
Cadet, MO 63630
(573) 438-4982
Gr: PK-2 | 229 students Student-teacher ratio: 11:1 Minority enrollment: 4%
Frequently Asked Questions
What are the top-ranked public schools in Washington County, MO?
The top-ranked public schools in Washington County, MO include Potosi Elementary School, Kingston Elementary School and Trojan Intermediate.
How many public schools are located in Washington County?
12 public schools are located in Washington County.
What percentage of students in Washington County go to public school?
98% of all K-12 students in Washington County are educated in public schools (compared to the MO state average of 88%).
What is the racial composition of students in Washington County?
Washington County public schools minority enrollment is 4% of the student body (majority Hispanic), which is less than the Missouri public schools average of 33% (majority Black).
Which public schools in Washington County are often viewed compared to one another?
Popular comparisons of public schools in Washington County include: Kingston High School vs. Potosi High School, Potosi High School vs. Kingston High School
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