Beta You're viewing our redesigned school page. Prefer the classic layout?

Castlio Elementary

Q: Is Castlio Elementary a good school?

Castlio Elementary ranks 103 rd of 900 Missouri elementary schools. SchoolDigger rates this school 4 stars out of 5.

Public Grades K-5

103^rd

SchoolDigger Rank ?

of 900 Missouri Elementary Schools

Better than 89% of Missouri elementary schools

Summary

Castlio Elementary is a public elementary school located in Saint Charles, Missouri, serving 838 students in grades K-5. It is part of the Francis Howell R-III School District, which is ranked 22 out of 367 districts in Missouri and is rated 5 stars out of 5 by SchoolDigger.

Castlio Elementary consistently ranks among the top 100 elementary schools in Missouri, with its students consistently outperforming their peers in the district and state on state assessments, particularly in mathematics and English Language Arts. The school performs exceptionally well with its White and Gifted and Talented student subgroups, ranking among the top 20-30 schools in Missouri. It also performs well with its Special Education and Low Socioeconomic Status (SES) student subgroups, ranking in the top 30-50 schools in Missouri. Castlio Elementary spends between $12,060 and $13,685 per student, which is higher than the state average, and has a student-teacher ratio between 12.6 and 13.1, lower than the district and state averages.

Compared to nearby schools within the Francis Howell R-III School District, such as Warren Elementary, Independence Elementary, and Fairmount Elementary, Castlio Elementary's academic performance is generally higher. However, Becky-David Elementary and Central Elementary, also within the same district, show comparable or even stronger academic performance in certain grade levels and subject areas.

847

Students ?

12.9

Student/teacher ratio ?

$14,728

Per pupil spending ?

12.2%

Free/discounted lunch ?

1020 Dingledine Rd
Saint Charles, MO 63304-6906

(636) 851-4300

District: Francis Howell R-III

Students who attend Castlio Elementary usually attend:

Middle:	Bryan Middle
High:	Francis Howell Central High

Racial breakdown:

White:

73.8%

Asian:

7.7%

Hispanic:

6.4%

See top rated Missouri elementary schools

Compare Castlio Elementary to nearby elementary schools!

At a glance

▬ Ranking trend: Holding steady — 91st percentile in 2015 → 89th in 2025

Strengths

✓Test scores above the Missouri average (63% vs 42% meeting standards)

✓Ranks in the top 11% of Missouri elementary schools

Worth a look

!Some student groups rank well below the school's overall statewide standing

Students meeting standards (2024-2025) ?

This school63%

District avg61%

Missouri avg42%

103^rd of 900

Missouri public elementary schools ?

Top 11%▼ down 2 pts since 2015

See the entire ranking list of Missouri Elementary Schools →

★★★★★

SchoolDigger rating ?

6^th of 10Elementary Schools in the Francis Howell R-III

22^nd of 367Francis Howell R-III among Missouri 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	Missouri percentile	Rating
2025	86.8	103 of 900	88.6%	★★★★☆
2024	87.5	81 of 906	91.1%	★★★★★
2023	81.9	133 of 898	85.2%	★★★★☆
2022	86.5	92 of 908	89.9%	★★★★☆
2021	87.1	93 of 901	89.7%	★★★★☆
2019	89.2	60 of 1052	94.3%	★★★★★
2018	87.1	91 of 1045	91.3%	★★★★★
2017	88.3	68 of 1032	93.4%	★★★★★
2016	84.7	112 of 865	87.1%	★★★★☆
2015	86.7	99 of 1058	90.6%	★★★★★
2014	88.4	68 of 1089	93.8%	★★★★★
2013	88.9	55 of 1108	95.0%	★★★★★
2012	89.1	53 of 1085	95.1%	★★★★★
2011	78.0	174 of 1088	84.0%	★★★★☆
2010	80.3	146 of 1066	86.3%	★★★★☆
2009	70.7	251 of 1053	76.2%	★★★★☆
2008	71.1	233 of 1084	78.5%	★★★★☆
2007	74.3	188 of 1080	82.6%	★★★★☆
2006	73.7	197 of 1074	81.7%	★★★★☆

Disabled

Year	Avg score	Statewide rank	Missouri percentile	Rating
2022	49.6	55 of 103	46.6%	★★☆☆☆
2021	68.1	19 of 81	76.5%	★★★★☆
2019	58.1	133 of 302	56.0%	★★★☆☆
2018	43.2	160 of 251	36.3%	★★☆☆☆

Gifted and Talented

Year	Avg score	Statewide rank	Missouri percentile	Rating
2019	71.1	11 of 91	87.9%	★★★★☆
2018	69.6	18 of 70	74.3%	★★★★☆

Low Socio Economic Status

Year	Avg score	Statewide rank	Missouri percentile	Rating
2019	89.4	31 of 907	96.6%	★★★★★
2018	57.6	327 of 887	63.1%	★★★☆☆

Special Education

Year	Avg score	Statewide rank	Missouri percentile	Rating
2023	58.5	29 of 107	72.9%	★★★★☆

White

Year	Avg score	Statewide rank	Missouri percentile	Rating
2025	80.2	115 of 666	82.7%	★★★★☆
2024	80.1	106 of 668	84.1%	★★★★☆
2023	72.8	159 of 673	76.4%	★★★★☆
2022	78.0	133 of 675	80.3%	★★★★☆
2021	81.7	102 of 691	85.2%	★★★★☆
2019	83.6	94 of 917	89.7%	★★★★☆
2018	82.3	112 of 898	87.5%	★★★★☆

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)

Low Socio Economic Status (2019)97th percentile~ school

Gifted and Talented (2019)88th percentile-6 vs school

White (2025)83rd percentile-6 vs school

Special Education (2023)73rd percentile-12 vs school

Disabled (2022)47th percentile-43 vs school

By subject vs Missouri (2024-2025) ?

Mathematics65%+24 vs state

English Language Arts64%+20 vs state

Science53%+11 vs state

3.0

1 rating · 1 written review

5★0

4★0

3★1

2★0

1★0

Rate Castlio Elementary

Have first-hand experience? A quick rating - and a sentence or two about what stands out (teachers, academics, safety, communication) - helps other families know what to expect.

Takes about a minute. We email you a link to verify your review - your address is never shown publicly.

Tap a star to rate

What people are saying

by a parent
Friday, August 26, 2016

I had great expectation when i moved my kids to Castlio Elementary. I see some staff are great and stay with up to date /track kids progress in their class and in Advanced class or Extensions / Sega / Spectra. My kid unfortunately got a teacher who I don't think is passionate in teaching , tracking kids activities nor she is aware of progress of kids educational activities in Advanced class or Extensions / Sega / Spectra. Another big drawback this school / school district is they don't have Science or Social subjects at Elementary, which is a big difference when compared to Rockwood or Ladue schools. Only subject where the school does good is in Language & Arts. I definitely think, teachers who are teaching 20 years in a conventional ways must have to go through training to accept the changes in STEM and incorporate in academics, inspire kids showing interest teaching and tracking kids progress. My experience so far, teacher makes a big difference on child's academics and future. This school does need to improve the quality of teachers and academics. Close Quote

Schools Near Castlio Elementary

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

School													Students/Teachers											Ranking (2025)				Ranking (2024)				MAP Mathematics (2025)			MAP Science (2025)	MAP English Language Arts (2025)			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	MAP Mathematics 3rd Grade	MAP Mathematics 4th Grade	MAP Mathematics 5th Grade	MAP Science 5th Grade	MAP English Language Arts 3rd Grade	MAP English Language Arts 4th Grade	MAP English Language Arts 5th Grade	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Castlio Elementary	Public	K-5	1020 Dingledine Rd	Saint Charles	63304	St. Charles County	Francis Howell R-III	No	No	No	No	(636) 851-4300	847	65	12.9	12.2%	625 (73.8%)	46 (5.4%)	54 (6.4%)	65 (7.7%)	3 (0.4%)	0 (0.0%)	54 (6.4%)	86.8	103^rd of 900 public elementary schools	88.6%		87.5	81^st of 906 public elementary schools	91.1%	22	56.0	73.5	65.0	53.2	55.2	72.2	63.8	$14,728	$595	$14,133
Central Elementary	Public	PK, KG-5	4525 Central School Rd	Saint Charles	63304	St. Charles County	Francis Howell R-III	No	No	No	Yes	(636) 851-5700	865	64	13.6	31.8%	568 (65.7%)	145 (16.8%)	66 (7.6%)	16 (1.8%)	3 (0.3%)	0 (0.0%)	67 (7.7%)	65.6	305^th of 900 public elementary schools	66.1%		66.4	284^th of 906 public elementary schools	68.7%	21	46.2	43.2	35.2	45.9	52.1	55.5	60.3	$14,127	$544	$13,583
Becky-David Elementary	Public	PK, KG-5	1155 Jungs Station Rd	Saint Charles	63303	St. Charles County	Francis Howell R-III	No	No	No	No	(636) 851-4200	812	62	13.0	14.8%	606 (74.6%)	62 (7.6%)	47 (5.8%)	42 (5.2%)	0 (0.0%)	1 (0.1%)	54 (6.7%)	88.4	86^th of 900 public elementary schools	90.4%		89.9	63^rd of 906 public elementary schools	93.0%	23	74.4	63.4	59.3	51.6	78.4	67.5	63.5	$14,662	$365	$14,296
Fairmount Elementary	Public	K-5	1725 Thoele Rd	St Peters	63376	St. Charles County	Francis Howell R-III	No	No	No	No	(636) 851-4500	971	74	13.1	20.8%	761 (78.4%)	68 (7.0%)	50 (5.1%)	19 (2.0%)	1 (0.1%)	0 (0.0%)	72 (7.4%)	67.7	276^th of 900 public elementary schools	69.3%		77.9	167^th of 906 public elementary schools	81.6%	109	48.4	36.7	46.1	44.6	54.2	54.5	59.0	$14,600	$386	$14,214
Henderson Elementary	Public	K-5	2501 Hackmann Rd	Saint Charles	63303	St. Charles County	Francis Howell R-III	No	No	No	Yes	(636) 851-5200	653	55	11.8	30.5%	430 (65.8%)	56 (8.6%)	96 (14.7%)	28 (4.3%)	1 (0.2%)	2 (0.3%)	40 (6.1%)	78.9	170^th of 900 public elementary schools	81.1%		88.1	75^th of 906 public elementary schools	91.7%	95	47.8	63.7	48.6	46.9	56.0	71.0	63.0	$15,671	$438	$15,233
Warren Elementary	Public	K-5	141 Weiss Rd	St Peters	63376	St. Charles County	Francis Howell R-III	No	No	No	No	(636) 851-6100	729	55	13.3	9.9%	551 (75.6%)	44 (6.0%)	45 (6.2%)	44 (6.0%)	4 (0.5%)	0 (0.0%)	41 (5.6%)	95.6	22^nd of 900 public elementary schools	97.6%		93.8	31^st of 906 public elementary schools	96.6%	9	76.8	72.0	71.8	68.9	76.7	73.6	73.8	$14,919	$402	$14,517
Independence Elementary	Public	K-5	4800 Meadows Pkwy	Saint Charles	63304	St. Charles County	Francis Howell R-III	No	No	No	No	(636) 851-5900	762	52	14.6	11.5%	604 (79.3%)	47 (6.2%)	31 (4.1%)	19 (2.5%)	1 (0.1%)	2 (0.3%)	58 (7.6%)	94.6	30^th of 900 public elementary schools	96.7%		92.1	44^th of 906 public elementary schools	95.1%	14	68.4	66.8	79.3	71.2	70.0	73.5	75.7	$14,200	$299	$13,901
Hawthorn Elementary	Public	K-5	166 Boone Hills Dr	St Peters	63376	St. Charles County	Fort Zumwalt School District	No	No	No	Yes	(636) 474-3999	458	37	12.4	24.9%	287 (62.7%)	81 (17.7%)	35 (7.6%)	16 (3.5%)	2 (0.4%)	1 (0.2%)	36 (7.9%)	66.9	289^th of 900 public elementary schools	67.9%		67.7	274^th of 906 public elementary schools	69.8%	15	41.6	51.3	48.1	50.6	51.0	49.9		$16,131	$977	$15,154
Harvest Ridge Elementary	Public	PK, KG-5	1220 Harvest Ridge Dr	Saint Charles	63303	St. Charles County	Francis Howell R-III	No	No	No	Yes	(636) 851-5100	572	51	11.2	23.1%	304 (53.1%)	99 (17.3%)	47 (8.2%)	71 (12.4%)	4 (0.7%)	1 (0.2%)	46 (8.0%)	72.6	224^th of 900 public elementary schools	75.1%		72.8	224^th of 906 public elementary schools	75.3%		48.9	49.3	59.4	57.6	43.6	51.5	54.0	$15,826	$260	$15,566
Lewis Clark Elementary	Public	3-5	460 McMenamy Rd	St Peters	63376	St. Charles County	Fort Zumwalt School District	No	No	No	Yes	(636) 397-3111	426	33	12.8	33.3%	308 (72.3%)	31 (7.3%)	46 (10.8%)	12 (2.8%)	0 (0.0%)	1 (0.2%)	28 (6.6%)	49.7	471^st of 900 public elementary schools	47.7%		45.2	507^th of 906 public elementary schools	44.0%	36	29.4	42.9	34.0	42.6	43.1	46.0	42.1	$13,486	$65	$13,421

Frequently Asked Questions about Castlio Elementary

What district is Castlio Elementary in?

Francis Howell R-III

How many students attend Castlio Elementary?

In the 2024-25 school year, 847 students attended Castlio Elementary.

What is the racial makeup of Castlio Elementary?

Students at Castlio Elementary are 74% White, 8% Asian, 6% Hispanic, 6% Two or more races, 5% African American.

Is Castlio Elementary a good school?

Castlio Elementary ranks 103^rd of 900 Missouri elementary schools. SchoolDigger rates this school 4 stars out of 5.

What schools do graduates of Castlio Elementary attend?

Students who attend Castlio Elementary usually go on to attend:

Middle : Bryan Middle
High : Francis Howell Central High

Rate Castlio Elementary!

Other helpful SchoolDigger resources...

Compare to nearby schools

MOMissouri Elementary School Rankings

MOMissouri District Rankings

Schools in Saint Charles, MO

Sign up for updates!

Be the first to know when there is an update for Castlio Elementary!

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Missouri Department of Elementary and Secondary 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.