Best High Schools in Illinois

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Find the best Illinois high schools with SchoolDigger.com! Focused on test scores for accurate rankings, our user-friendly site simplifies your search. Empower your decisions by exploring top-rated schools, only on SchoolDigger.com - the ultimate guide to K-12 schools!

Year after year, SchoolDigger is always the first to publish Illinois test scores and rankings. Other sites use stale test score data that are several years old! Be in the know with the very latest performance metrics.

The list is updated annually upon the release of the PreACT Secure and ACT test scores by the Illinois State Board of Education. The most recent update was on Thursday, October 30, 2025.

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School														Students/Teachers											Per Pupil Expenditures (2025)							Ranking (2025 vs 2024)					ID
Rank (of 698)	School	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	# Students	Full-time Teachers	Student/ Teacher Ratio	Free/Disc Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Per Pupil Expenditures: Total	Personnel from Federal Funds	Non-Personnel from Federal Funds	Total from Federal Funds	Personnel from State and Local Funds	Non-Personnel from State and Local Funds	Total from State and Local Funds	Average Standard Score (2025)	Average Standard Score (2024)	Rank (2024)	Rank Change from 2024	SchoolDigger Rating (2025)	ID
101	Antioch Community High School	Public	9-12	1133 Main St	Antioch	60002	Lake County	Chsd 117	No	(n/a)	No	Yes	(847) 838-7179	1,313	91	14.3		946 (72.0%)	61 (4.6%)	226 (17.2%)	38 (2.9%)	3 (0.2%)	2 (0.2%)	36 (2.7%)	$22,969			$381			$22,588	81.6	77.8	126	25		170387000075
101	O Fallon High School	Public	9-12	600 S Smiley St	O Fallon	62269	St. Clair County	O Fallon Township HSD 203	No	(n/a)	No	Yes	(618) 632-3507	2,540	156	16.3	28.1%	1,499 (59.0%)	518 (20.4%)	205 (8.1%)	63 (2.5%)	2 (0.1%)	1 (0.0%)	239 (9.4%)	$14,005			$635			$13,369	81.6	84.7	91	10		172979003090
103	Pecatonica High School	Public	9-12	1300 Main St	Pecatonica	61063	Winnebago County	Pecatonica CUSD 321	No	(n/a)	No	No	(815) 239-2611	313	23	13.6	30.7%	277 (88.5%)	3 (1.0%)	15 (4.8%)	3 (1.0%)	1 (0.3%)	0 (0.0%)	14 (4.5%)	$16,324			$111			$16,213	81.4	76.2	135	32		173105003229
104	Somonauk High School	Public	9-12	501 W Market St	Somonauk	60552	DeKalb County	Somonauk CUSD 432	No	(n/a)	No	No	(815) 498-2314	224	21	10.7	41.1%	190 (84.8%)	3 (1.3%)	24 (10.7%)	4 (1.8%)	0 (0.0%)	0 (0.0%)	3 (1.3%)	$18,467			$275			$18,193	81.3	83.1	102	2		173657003764
105	Pleasant Plains High School	Public	9-12	500 N Cartwright St	Pleasant Plains	62677	Sangamon County	Pleasant Plains CUSD 8	No	(n/a)	No	No	(217) 626-1044	416	31	13.4		386 (92.8%)	8 (1.9%)	6 (1.4%)	2 (0.5%)	2 (0.5%)	1 (0.2%)	11 (2.6%)	$14,628			$34			$14,594	81.3	74.9	140	35		173192003349
106	Waterloo High School	Public	9-12	505 E Bulldog	Waterloo	62298	Monroe County	Waterloo CUSD 5	No	(n/a)	No	No	(618) 939-3455	876	51	17.1	20.0%	813 (92.8%)	2 (0.2%)	24 (2.7%)	2 (0.2%)	4 (0.5%)	0 (0.0%)	31 (3.5%)	$11,959			$488			$11,472	80.8	88.3	76	30		174107004113
107	Cissna Park Senior High School	Public	9-12	511 N 2nd St	Cissna Park	60924	Iroquois County	Cissna Park CUSD 6	No	(n/a)	No	No	(815) 457-2171	98	12	8.2	26.5%	89 (90.8%)	4 (4.1%)	5 (5.1%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	$17,394			$440			$16,954	80.7	38.1	409	302		171029001250
108	Mascoutah High School	Public	9-12	1313 W Main St	Mascoutah	62258	St. Clair County	Mascoutah CUD 19	No	(n/a)	No	No	(618) 566-8523	1,243	80	15.5	21.8%	821 (66.0%)	130 (10.5%)	127 (10.2%)	26 (2.1%)	4 (0.3%)	4 (0.3%)	121 (9.7%)	$13,903			$828			$13,076	80.6	89.9	67	41		172494002701
109	Beecher City Junior-Senior High School	Public	6-12	438 E State Highway 33	Beecher City	62414	Effingham County	Beecher City CUSD 20	No	(n/a)	No	Yes	(618) 487-5100	165	16	10	46.1%	151 (91.5%)	4 (2.4%)	3 (1.8%)	3 (1.8%)	0 (0.0%)	0 (0.0%)	4 (2.4%)	$14,859			$101			$14,759	80.2	76.2	136	27		170546000225
110	Orion High School	Public	9-12	1100 13th St	Orion	61273	Henry County	Orion CUSD 223	No	(n/a)	No	No	(309) 526-3361	285	19	14.6	17.9%	266 (93.3%)	3 (1.1%)	5 (1.8%)	4 (1.4%)	0 (0.0%)	0 (0.0%)	7 (2.5%)	$13,704			$35			$13,669	80.2	87.3	78	32		173020003120

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About our rankings:

Schooldigger calculates school rankings based on PreACT Secure English Language Arts, PreACT Secure Mathematics, PreACT Secure Science, ACT English Language Arts, ACT Mathematics, ACT Science test scores released by the Illinois State Board of Education.
These rankings were last updated on October 30, 2025, and are based on the most recent test scores available. We update rankings as we receive new test scores from the Illinois State Board of Education, usually on a yearly basis.
Our sources of data include the National Center for Education Statistics, U.S. Department of Education and the Illinois State Board of Education.
For more information about our ranking process, please see our Ranking FAQ. Details about our methodology are here.

Educational resources:

Every Student Succeeds Act (ESSA): Transforming Education in America

No Child Left Behind (NCLB): A Comprehensive Analysis of Its Impact on Education

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau, the Illinois Department of Public Health and the Illinois State Board of Education.