Platte County R-3 High School is located in Platte City, Missouri. The largest of the three high schools in the Platte County School District, North Platte High School and West Platte High School, that serve students in Platte County.
Serving 1,397 students in grades 9-12, Platte County High School ranks in the top 10% of all schools in Missouri for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 57% (which is higher than the Missouri state average of 40%). The percentage of students achieving proficiency in reading/language arts is 63% (which is higher than the Missouri state average of 43%).
The student-teacher ratio of 17:1 is higher than the Missouri state level of 12:1.
Minority enrollment is 28% of the student body (majority Black and Hispanic), which is lower than the Missouri state average of 33% (majority Black).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 1,397 students
- Student-Teacher Ratio: 17:1
- Minority Enrollment: 28%
- Graduation Rate: 92% (Top 20% in MO)
- Overall Testing Rank: Top 10%
- Math Proficiency: 57% (Top 20%)
- Reading Proficiency: 63% (Top 10%)
- Science Proficiency: 54% (Top 20%)
- Source: National Center for Education Statistics (NCES), MO Dept. of Education
Top Rankings
Platte County High School ranks among the top 20% of public schools in Missouri for:
Category
Attribute
Overall Rank
Math Proficiency
Reading/Language Arts Proficiency
Science Proficiency
Graduation Rate
School Overview
Platte County High School's student population of 1,397 students has grown by 6% over five school years.
The teacher population of 81 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
(No virtual instruction)
(No virtual instruction)
Total Students
1,397 students
Total Classroom Teachers
81 teachers
School Calendar
School Rankings
Platte County High School ranks within the top 10% of all 2,076 schools in Missouri (based off of combined math and reading proficiency testing data).
The diversity score of Platte County High School is 0.46, which is less than the diversity score at state average of 0.52. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#189 out of 2076 schools
(Top 10%)
(Top 10%)
Math Test Scores (% Proficient)
57%
40%
Reading/Language Arts Test Scores (% Proficient)
63%
43%
Science Test Scores (% Proficient)
54%
38%
Student-Teacher Ratio
17:1
12:1
American Indian
1%
n/a
Asian
3%
2%
Hispanic
11%
9%
Black
11%
15%
White
72%
67%
Hawaiian
1%
1%
Two or more races
1%
6%
All Ethnic Groups
Graduation Rate
92%
90%
Eligible for Free Lunch
16%
43%
Eligible for Reduced Lunch
3%
7%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), MO Dept. of Education
School Notes
- School Mascot: Pirate
Frequently Asked Questions
What is Platte County High School's ranking?
Platte County High School is ranked #189 out of 2,076 schools, which ranks it among the top 10% of public schools in Missouri.
What schools are Platte County High School often compared to?
Platte County High Schoolis often viewed alongside schools like West Platte High School, North Platte High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
57% of students have achieved math proficiency (compared to the 40% MO state average), while 63% of students have achieved reading proficiency (compared to the 43% MO state average).
What is the graduation rate of Platte County High School?
The graduation rate of Platte County High School is 92%, which is higher than the Missouri state average of 90%.
How many students attend Platte County High School?
1,397 students attend Platte County High School.
What is the racial composition of the student body?
72% of Platte County High School students are White, 11% of students are Hispanic, 11% of students are Black, 3% of students are Asian, 1% of students are American Indian, 1% of students are Hawaiian, and 1% of students are Two or more races.
What is the student-teacher ratio of Platte County High School?
Platte County High School has a student ration of 17:1, which is higher than the Missouri state average of 12:1.
What grades does Platte County High School offer ?
Platte County High School offers enrollment in grades 9-12 (No virtual instruction).
What school district is Platte County High School part of?
Platte County High School is part of Platte County R-III School District.
School Reviews
5 10/10/2025
QUALITY LEADERSHIP VERY GOOD HIGH SCHOOL
1 10/10/2025
We moved because there was not enough training for staff. If you are college bound or special needs this is not the district for you.
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