| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| Community High School District 155 | Crystal Lake | 9/10 Excellent · 89th pct | 5,405 | 5 | 9–12 | 4 |
| Riley Community Consolidated School District 18 | Marengo | 9/10 Excellent · 85th pct | 270 | 1 | K–8 | 0 |
| Huntley Consolidated School District 158 | Huntley | 9/10 Excellent · 81st pct | 8,595 | 9 | PK–12 | 2 |
| Marengo Community High School District 154 | Marengo | 9/10 Excellent · 81st pct | 685 | 1 | 9–12 | 2 |
| Nippersink School District 2 | Richmond | 8/10 Good · 76th pct | 1,102 | 3 | PK–8 | 0 |
| Prairie Grove Community School District 46 | Crystal Lake | 8/10 Good · 72nd pct | 813 | 2 | PK–8 | 0 |
| Woodstock Community Unit School District 200 | Wonder Lake | 8/10 Good · 72nd pct | 6,159 | 12 | PK–12 | 2 |
| Alden-Hebron School District 19 | Hebron | 8/10 Good · 71st pct | 438 | 3 | PK–12 | 1 |
| McHenry Community High School District 156 | McHenry | 7/10 Good · 60th pct | 2,222 | 1 | 9–12 | 2 |
| Cary Community Consolidated School District 26 | Cary | 6/10 Average · 59th pct | 2,302 | 5 | PK–8 | 0 |
| Marengo-Union Elementary Consolidated District 165 | Marengo | 6/10 Average · 54th pct | 1,055 | 3 | PK–8 | 0 |
| Crystal Lake Community Consolidated School District 47 | Crystal Lake | 6/10 Average · 51st pct | 7,109 | 13 | PK–8 | 0 |
| Community Unit School District 300 | Algonquin | 5/10 Average · 47th pct | 20,443 | 29 | PK–12 | 1 |
| McHenry Community Consolidated School District 15 | McHenry | 5/10 Average · 46th pct | 4,079 | 8 | PK–8 | 0 |
| Johnsburg Community Unit School District 12 | Ringwood | 5/10 Average · 43rd pct | 1,703 | 4 | PK–12 | 1 |
| Fox River Grove Consolidated School District 3 | Fox River Grove | 4/10 Below Average · 33rd pct | 408 | 2 | PK–8 | 0 |
| Harrison School District 36 | Wonder Lake | 3/10 Below Average · 28th pct | 402 | 1 | PK–8 | 0 |
| Harvard Community Unit School District 50 | Harvard | 1/10 Poor · 5th pct | 2,510 | 5 | PK–12 | 1 |
| Richmond-Burton Community High School District 157 | Richmond | Not rated | 549 | 1 | 9–12 | 2 |
How McHenry County compares
Together they enroll 66,249 students across 108 schools. The largest is Community Unit School District 300 with 20,443 students. Districts here average 6.4/10, above the Illinois average of 5.6/10. Ratings range from 1/10 to 9/10. 1 of the 19 districts has no state assessment data and is shown as Not rated.
School Districts in McHenry County, Illinois
McHenry County has 19 public school districts covering 18 zip codes. The top-rated district in McHenry County is Community High School District 155 (9/10). Ratings are based on the share of students proficient in reading and math on state assessments (IAR 2023–24), ranked against all districts in Illinois. Directory details come from NCES CCD 2024–25.
Enter your zip code on any page to confirm your exact district assignment — district boundaries are address-specific and may not follow county or city lines.
Frequently Asked Questions
How many school districts are in McHenry County, IL?
19 school districts serve zip codes in McHenry County, IL. This page lists each one with its rating, enrollment, grade span and the zip codes it covers.
What is the best-rated school district in McHenry County, IL?
Of the districts serving McHenry County, Community High School District 155 has the highest rating on this site at 9/10. That places it in the 89th percentile among Illinois school districts.
How are these school district ratings calculated?
Each rating is the share of students scoring proficient or above on Illinois reading and math assessments, ranked against other districts in Illinois and converted to a 1–10 scale. Percentiles compare districts within Illinois only, never across state lines.