Total enrollment
3,450
+35 (+1%) vs SY 2020-21
Washington County
Missouri · Public K-12
Washington County, Missouri comes in at 12 public K-12 schools on the latest counts, totaling roughly 3,450 students, with a county median household income near $56,043. The level mix is 5 elementary, 3 middle, and 3 high schools.
4-year change in Washington County
SY 2020-21 vs SY 2024-25School count
12
0 (0%) vs SY 2020-21
Source: NCES Common Core of Data, enrollment-weighted demographic averages
How Washington County ranks
Among counties| Measure | This county | In Missouri | In the US |
|---|---|---|---|
| State test proficiency ranked highest first | 41.9% | #37 of 100 | N/A |
| Enrollment ranked largest first | 3,450 | #45 of 101 | #1,697 of 2,745 |
| Number of schools ranked most first | 12 | #57 of 101 | N/A |
| Students per teacher ranked fewest first | 12.4:1 | #55 of 101 | #684 of 2,655 |
| Free or reduced-price lunch share ranked highest first | 100.0% | #2 of 101 | #28 of 2,526 |
| Diversity index ranked most diverse first | 7.2% | #94 of 99 | #2,579 of 2,707 |
Counties need at least 3 schools and 1,000 students to be ranked. Test proficiency is ranked within the state only, since each state gives a different test. Each rank links to the full list.
Washington County school rankings
Residents
23,470
all ages · ACS 5-yr
Schools
12
5 districts
Enrollment
3,450
students · NCES CCD
Median income
$56,043
Below Missouri avg
Free/reduced lunch
100.0%
Above Missouri avg
Elementary
5
1,421 students
Middle
3
923 students
High
3
1,102 students
Combined / other
1
4 students
LARGEST DISTRICT
POTOSI R-III
2,110 students · 5 districts in Washington County
County vs. school enrollment demographics
Left bar is the racial makeup of Washington County residents (Census ACS 5-year). Right bar is the enrollment-weighted makeup of public schools in the county (NCES CCD). NCES systematically under-reports Hispanic, Pacific Islander, and Native American enrollment for many schools; where the resident share is meaningful but the reported school share is zero, we mark the school bar "not reported".
County residents
School enrollment
Bachelor's+
11.7%
adults 25+
Poverty rate
13.0%
ACS 5-year
Unemployment
3.6%
civilian labor
Median age
41
23.5% under 18
Test scores in Washington County
Latest 2024-25 ELA proficiency, 8 schools ranked. Missouri state average: 44.9%.
Top 5 schools (ELA)
- POTOSI HIGH· 65.3%
- TROJAN INTERMEDIATE· 58.6%
- KINGSTON ELEM.· 47.5%
- POTOSI ELEM.· 47.3%
- JOHN A. EVANS MIDDLE· 45.1%
Lowest 5 schools (ELA)
- CALEDONIA ELEM.· 32.6%
- KINGSTON MIDDLE· 33.2%
- RICHWOODS ELEM.· 37.9%
- JOHN A. EVANS MIDDLE· 45.1%
- POTOSI ELEM.· 47.3%
| Name | City | Level | Grades | Enrollment | Rating |
|---|---|---|---|---|---|
| POTOSI ELEM. | Potosi | Elementary | PK-03 | 683 | · |
| POTOSI HIGH | Potosi | High | 09-12 | 673 | · |
| TROJAN INTERMEDIATE | Potosi | Middle | 04-06 | 438 | · |
| JOHN A. EVANS MIDDLE | Potosi | Middle | 07-08 | 316 | · |
| KINGSTON HIGH | Cadet | High | 09-12 | 259 | · |
| KINGSTON PRIMARY | Cadet | Elementary | PK-02 | 229 | · |
| CALEDONIA ELEM. | Caledonia | Elementary | PK-06 | 198 | · |
| KINGSTON ELEM. | Cadet | Elementary | 03-05 | 174 | · |
| VALLEY HIGH | Caledonia | High | 07-12 | 170 | · |
| KINGSTON MIDDLE | Cadet | Middle | 06-08 | 169 | · |
| RICHWOODS ELEM. | Richwoods | Elementary | PK-08 | 137 | · |
| CITADEL SCHOOL | Potosi | Combined | KG-12 | 4 | · |
Cities in Washington County
About Washington County
Washington County is a small Missouri county of about 23,470 residents, home to 12 public schools and roughly 3,450 students.
For perspective, census numbers show the median household earns about $56,043 a year, roughly 12% of adults have completed at least a four-year degree, and roughly 13% of residents live below the federal poverty line. That income level is 9% meaningfully below the Missouri median.
In terms of grade levels, Washington County covers 5 elementary schools (1,421 students), 3 middle schools (923), 3 high schools (1,102), and 1 combined or other schools.
POTOSI R-III dominates the local landscape, accounting for roughly 2,110 students on its own.
Trend over the past 4 years. Total public-school enrollment in Washington County has stayed largely flat since SY 2020-21, moving from about 3,415 students to 3,450.
Within the allk12 community for this area, the community for Washington County discusses comparison threads between local schools and program reviews. Parents, students, and educators in the area can post or comment.
Frequently asked questions
DATA · Census ACS 5-year · NCES Common Core of Data