Waterloo High School
#104
Best ACT in Illinois High Schools
895
Students
17.6:1
S:T Ratio
School Snapshot
Key metrics at a glance1,180
B+
26
A-
18:1
B
93%
A+
43%
B-
39%
C+
This Week at Waterloo – August 18, 2026
117 students practicing on Varsity Tutors
Academic Resources
Typical courses and practice resources for students at Waterloo High School
Standardized Test Dates
Upcoming national, state, and school calendar dates that affect students at Waterloo High School.
National Tests
August 1, 2026 – November 30, 2026
ISEE — Fall Testing Season
August 3, 2026 – June 30, 2027
SSAT — Flex Testing
August 22, 2026
SAT — National
August 28, 2026
SAT — National
September 1, 2026
ACT — National
September 1, 2026
SAT — National
After Waterloo High
Where graduates go and what they studySouthern Illinois University Edwardsville
University of Illinois Urbana-Champaign
University of Missouri
Southwestern Illinois College
Purdue University
Michigan State University
Maryville University of St. Louis
Illinois State University
Nursing
Psychology
Business
Biology
Computer Science
Pre-Medicine Studies
Chemistry
Education
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505 E Bulldog, Waterloo, IL 62298
(618)939-3455
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Waterloo CUSD 5