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Mercer County High School

Q: Is Mercer County High School a good school?

Mercer County High School ranks 383 rd of 698 Illinois high schools. SchoolDigger rates this school 2 stars out of 5.

Public Grades 9-12

383^rd

SchoolDigger Rank ?

of 698 Illinois High Schools

Better than 45% of Illinois high schools

Summary

Mercer County High School is a public high school located in Aledo, Illinois, serving grades 9-12 with a total enrollment of 401 students. The school is part of the Mercer County School District 404, which is ranked 549 out of 811 districts in Illinois and has a 2-star rating from SchoolDigger.

Mercer County High School has seen a decline in its statewide ranking over the past few years, dropping from 197th out of 701 Illinois high schools in 2018-2019 to 383rd out of 698 in 2024-2025. The school's performance varies across different student subgroups, with higher rankings for Special Education students and Low Socio-Economic Status students, but lower rankings for White students and Military Connected students. While the school maintains a relatively high four-year graduation rate, its dropout rate has fluctuated, and its test scores, particularly in Mathematics, tend to lag behind the state averages.

Compared to nearby schools like Monmouth-Roseville High School, Sherrard High School, and Rockridge High School, Mercer County High School's performance is generally on par with or slightly below these counterparts. The school also faces challenges with high chronic absenteeism rates, which may be contributing to its lower test scores and graduation rates. Addressing these issues, as well as the school's socio-economic factors, could be key to driving better academic outcomes for its students.

411

Students ?

13.0

Student/teacher ratio ?

$16,731

Per pupil spending ?

41.6%

Free/discounted lunch ?

1500 S College Ave
Aledo, IL 61231-2513

(309) 582-2223

District: Mercer County School District 404

Feeder schools for Mercer County High School:

Elementary:	Apollo Elementary School
	New Boston Elementary School
Middle:	Mercer County Junior High School

Racial breakdown:

White:

92.9%

Two or more races:

3.2%

Hispanic:

2.2%

See top rated Illinois high schools

Compare Mercer County High School to nearby high schools!

At a glance

▼ Ranking trend: Declining — 70th percentile in 2015 → 45th in 2025

Worth a look

!Test scores below the Illinois average (39% vs 48% meeting standards)

!High chronic absenteeism (38% vs 25% Illinois)

!Ranking has slipped — down 25 percentile points since 2015

Students meeting standards (2024-2025) ?

This school39%

District avg39%

Illinois avg48%

383^rd of 698

Illinois public high schools ?

Bottom 45%▼ down 25 pts since 2015

From top 30% (2015) to bottom 45% (2025)

See the entire ranking list of Illinois High Schools →

★★★★★

SchoolDigger rating ?

549^th of 811Mercer County School District 404 among Illinois districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	45.9	383 of 698	45.1%	★★☆☆☆
2024	51.0	302 of 697	56.7%	★★★☆☆
2023	61.9	231 of 699	67.0%	★★★☆☆
2022	54.1	303 of 699	56.7%	★★★☆☆
2021	40.3	393 of 688	42.9%	★★☆☆☆
2019	64.8	197 of 701	71.9%	★★★★☆
2018	68.0	184 of 647	71.6%	★★★★☆
2017	59.7	247 of 642	61.5%	★★★☆☆
2016	59.6	187 of 643	70.9%	★★★★☆
2015	63.5	186 of 614	69.7%	★★★★☆
2014	55.3	320 of 670	52.2%	★★★☆☆
2013	65.0	256 of 670	61.8%	★★★☆☆
2012	55.2	341 of 665	48.7%	★★☆☆☆
2011	48.1	390 of 655	40.5%	★★☆☆☆

Disabled

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	44.9	204 of 491	58.5%	★★★☆☆
2024	57.8	107 of 429	75.1%	★★★★☆

Female

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	47.5	368 of 685	46.3%	★★☆☆☆
2024	48.0	307 of 664	53.8%	★★★☆☆
2023	60.0	238 of 656	63.7%	★★★☆☆
2022	50.1	322 of 658	51.1%	★★★☆☆
2021	43.9	336 of 639	47.4%	★★☆☆☆
2019	49.3	334 of 665	49.8%	★★★☆☆
2018	68.0	182 of 620	70.6%	★★★★☆

Low Socio Economic Status

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	49.6	335 of 672	50.1%	★★★☆☆
2024	32.7	413 of 639	35.4%	★★☆☆☆
2023	70.5	123 of 644	80.9%	★★★★☆
2022	73.3	105 of 626	83.2%	★★★★☆
2021	64.4	146 of 611	76.1%	★★★★☆
2019	57.8	220 of 639	65.6%	★★★☆☆
2018	81.2	47 of 585	92.0%	★★★★★

Male

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	41.7	409 of 685	40.3%	★★☆☆☆
2024	51.7	278 of 668	58.4%	★★★☆☆
2023	61.1	216 of 668	67.7%	★★★☆☆
2022	54.5	274 of 664	58.7%	★★★☆☆
2021	32.2	425 of 653	34.9%	★★☆☆☆
2019	73.7	139 of 675	79.4%	★★★★☆
2018	65.0	184 of 619	70.3%	★★★★☆

Military Connected

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	36.1	18 of 25	28.0%	★★☆☆☆
2024	14.5	21 of 23	8.7%	★☆☆☆☆
2022	35.1	16 of 26	38.5%	★★☆☆☆

Special Education

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	39.9	237 of 527	55.0%	★★★☆☆
2024	38.4	235 of 482	51.2%	★★★☆☆
2023	27.8	318 of 476	33.2%	★★☆☆☆
2022	31.2	286 of 493	42.0%	★☆☆☆☆
2021	29.3	270 of 453	40.4%	☆☆☆☆☆

White

Year	Avg score	Statewide rank	Illinois percentile	Rating
2025	25.2	452 of 564	19.9%	★☆☆☆☆
2024	36.6	316 of 554	43.0%	★★☆☆☆
2023	48.4	256 of 557	54.0%	★★★☆☆
2022	33.0	379 of 560	32.3%	★★☆☆☆
2021	24.6	424 of 553	23.3%	★☆☆☆☆
2019	43.3	269 of 552	51.3%	★★★☆☆
2018	55.1	208 of 548	62.0%	★★★☆☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Disabled (2025)58th percentile+13 vs school

Special Education (2025)55th percentile+10 vs school

Low Socio Economic Status (2025)50th percentile+5 vs school

Female (2025)46th percentile~ school

Male (2025)40th percentile-5 vs school

Military Connected (2025)28th percentile-17 vs school

White (2025)20th percentile-25 vs school

By subject vs Illinois (2024-2025) ?

English Language Arts46%-6 vs state

Science40%-8 vs state

Mathematics33%-6 vs state

★

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Schools Near Mercer County High School

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Immunizations Finance All

School													Students/Teachers											Ranking (2025)				Ranking (2024)				PreACT Secure English Language Arts (2025)		PreACT Secure Mathematics (2025)		PreACT Secure Science (2025)		ACT English Language Arts (2025)	ACT Mathematics (2025)	ACT Science (2025)	% Polio (2024)	% Measles (2024)	% Mumps (2024)	% Rubella (2024)	% Hepatitis B (2024)	% Varicella (2024)	% DTP (2024)	% Meningococcal (2024)	Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	PreACT Secure English Language Arts 9th Grade	PreACT Secure English Language Arts 10th Grade	PreACT Secure Mathematics 9th Grade	PreACT Secure Mathematics 10th Grade	PreACT Secure Science 9th Grade	PreACT Secure Science 10th Grade	ACT English Language Arts 11th Grade	ACT Mathematics 11th Grade	ACT Science 11th Grade	% Polio All Grades	% Measles All Grades	% Mumps All Grades	% Rubella All Grades	% Hepatitis B All Grades	% Varicella All Grades	% DTP All Grades	% Meningococcal All Grades	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Mercer County High School	Public	9-12	1500 S College Ave	Aledo	61231	Mercer County	Mercer County School District 404	No	(n/a)	No	No	(309) 582-2223	411	32	13.0	41.6%	382 (92.9%)	4 (1.0%)	9 (2.2%)	2 (0.5%)	1 (0.2%)	0 (0.0%)	13 (3.2%)	45.9	383^rd of 698 public high schools	45.1%		51	302^nd of 697 public high schools	56.7%	81	55.6	41.3	29.3	28.3	40.4	38.0	46.0	33.3	40.2	97.5	97.2	97.2	97.2	97.2	97.0	98.0	97.7	$16,731	$676	$16,055
Rockridge High School	Public	9-12	14110 134th Ave W	Taylor Ridge	61284	Rock Island County	Rockridge CUSD 300	No	(n/a)	No	No	(309) 793-8020	330	26	12.8	20.6%	313 (94.8%)	1 (0.3%)	8 (2.4%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	8 (2.4%)	68.6	182^nd of 698 public high schools	73.9%		66.3	183^rd of 697 public high schools	73.7%	1	75.6	58.4	42.3	40.3	65.4	48.1	46.7	40.0	40.0	99.1	99.1	99.1	99.1	99.1	99.1	99.1	96.4	$13,788	$400	$13,388
Sherrard High School	Public	9-12	4701 176th Ave	Sherrard	61281	Rock Island County	Sherrard CUSD 200	No	(n/a)	No	No	(309) 593-2175	449	34	13.3	25.8%	389 (86.6%)	1 (0.2%)	36 (8.0%)	0 (0.0%)	2 (0.4%)	1 (0.2%)	20 (4.5%)	65.3	205^th of 698 public high schools	70.6%		51.3	293^rd of 697 public high schools	58.0%	88	62.9	66.7	30.2	35.6	45.7	62.2	55.5	35.3	48.7	98.3	98.0	98.0	98.0	98.3	98.0	98.3	96.5	$16,603	$128	$16,475
Monmouth-Roseville High School	Public	9-12	200 S B St	Monmouth	61462	Warren County	Monmouth-Roseville CUSD 238	No	(n/a)	No	No	(309) 734-5118	483	29	16.4	52.0%	262 (54.2%)	12 (2.5%)	161 (33.3%)	17 (3.5%)	1 (0.2%)	1 (0.2%)	29 (6.0%)	43.1	410^th of 698 public high schools	41.3%		46.9	336^th of 697 public high schools	51.8%	74	55.9	40.6	32.4	22.6	46.1	38.7	33.9	30.6	37.2	99.2	98.8	98.8	98.8	99.0	98.8	98.6	95.3	$14,139	$1,475	$12,664

Frequently Asked Questions about Mercer County High School

How many students attend Mercer County High School?

In the 2024-25 school year, 411 students attended Mercer County High School.

What schools feed into Mercer County High School?

Mercer County High School is fed by the following schools:

Elementary : Apollo Elementary School
Elementary : New Boston Elementary School
Middle : Mercer County Junior High School

What is the racial makeup of Mercer County High School?

Students at Mercer County High School are 93% White, 3% Two or more races, 2% Hispanic.

Is Mercer County High School a good school?

Mercer County High School ranks 383^rd of 698 Illinois high schools. SchoolDigger rates this school 2 stars out of 5.

What district is Mercer County High School in?

Mercer County School District 404

Rate Mercer County High School!

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ILIllinois District Rankings

Schools in Aledo, IL

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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.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.