Compiled from official source data by PlainSchools.
9 public K-12 schools in Collinsville from NCES Common Core of Data: enrollment, grade span, demographics, and Civil Rights Data Collection statistics for every active campus.
According to NCES CCD 2024-25, Collinsville has more public-school enrollment than 59% of the 4,487 US cities in this directory. Collinsville High School enrolls 36.4% of Collinsville's public-school students. That is enough concentration for one institution to pull the citywide enrollment, staffing, and Resource Index averages toward its own profile. The smaller campuses below should therefore be compared directly rather than inferred from the headline mean; their grade configurations and program footprints can be materially different even inside the same district.
A full K–12 ladder sits inside the city boundary
Collinsville's list includes 4 elementary, 1 middle, and 1 high-school campus, plus 3 combined-grade records. The city average spans every major grade stage, so the ranked table is more informative when read within level than as one interchangeable queue.
A small portfolio contains radically different campus scales
Collinsville lists only 9 schools, yet reported enrollment runs from 86 to 1,956 students, a 23-fold range. In a portfolio this compact, the smallest record may be a specialized or nonstandard setting rather than a miniature version of the largest campus. That distinction affects how ratios and program fields should be read. Compare similarly configured grade levels first; combining the extremes into one city average conceals more than it explains.
City enrollment
Top 41%
School count
Top 46%
Resource Index average
28th percentile
Teacher staffing
67th percentile
Collinsville High School accounts for 36.4% of all Collinsville public-school enrollment
That dominant concentration means Collinsville-wide averages can mask substantial variation outside the largest entity. Grade level: High. The share measures enrollment concentration only; it does not establish how districts allocate programs, capital, or staff. Enrollment-weighted aggregates give this entity more weight than any smaller peer, while an unweighted entity average treats every record equally.
Collinsville school enrollment varies 23× across entities
Collinsville school enrollment ranges from 86 students (lowest) to 1,956 students (highest), a spread of 1,870 students. That spread is wider than typical and predicts noticeable gaps in service quality between the highest and lowest areas. Per-school staffing and program breadth can differ sharply at opposite ends of that enrollment range, so the city average should not be treated as a typical campus.
Collinsville operates one school district — a single-district system
Collinsville's listed schools share one district boundary, budget authority, and reporting chain. That makes citywide and districtwide governance easier to compare, but it does not make individual campuses uniform: grade configuration, staffing, programs, and student need can still vary materially within the same school district.
Collinsville student-teacher ratio is 14.0:1 — near the typical range (US average ~15.7) — citywide staffing is neither unusually lean nor unusually crowded by this measure
student-teacher ratio is the simplest comparative metric but it does not capture the full picture: the ratio counts FTE classroom teachers against total enrollment, push-in specialists, English-language aides, special-education co-teachers, and counselors are not included in most reporting Variation between sub-units within Collinsville is typically wider than the Collinsville-aggregate figure suggests.
Most racially and ethnically mixed schools in Collinsville
Ranked by the Simpson student-body diversity index (0-100) from NCES race and ethnicity data, where higher means a more evenly mixed student body. It measures mix, not quality.
What do families ask about schools in Collinsville?
Which Collinsville school has the highest Resource Investment Index? ▼
Kreitner Elem School has the highest Resource Investment Index among the Collinsville schools in this federal-data comparison at 46/100. The index summarizes reported staffing, counseling, gifted-program, and attendance inputs; it is not an academic rating.
How many schools are in Collinsville, IL? ▼
Collinsville has 9 public schools with a total enrollment of 5,375 students. Average student-teacher ratio: 14:1.
Data from NCES Common Core of Data (CCD) 2024-25 and Civil Rights Data Collection (CRDC) 2021-22. The Resource Investment Index uses reported student-teacher ratio,
counselor access, gifted programs, and attendance; it is not an academic rating. Cities must include at least five schools to be listed. This public-data comparison is for informational purposes:
verify current enrollment, attendance boundaries, and programs with the school district before acting. See the guide to understanding NCES data.
