Millsboro Middle School
🇺🇸 Official data · 2025Millsboro, Delaware 19966 · Indian River School District
#8 of 40 middle schools in Delaware
#5186 of 15,369 nationally
About Millsboro Middle School
Millsboro Middle School is a public middle located in Millsboro, in the Indian River School District school district of Delaware, United States. It caters for Grades 6–8. In 2025 it enrolled 726 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 61.3 out of 100, placing it in the top 50% of middle schools in United States and 8th of 40 ranked middle schools in Delaware. Its strongest component is reading proficiency (69th percentile), and its weakest is math proficiency (53th percentile).
Other published figures: enrollment 726.
There are 3 schools in Millsboro; Millsboro Middle School ranks 3rd of 3 scored schools there.
Success Index (US) breakdown
Each component is a percentile against middle schools across United States.
- Math proficiency (30%)44%
- Reading proficiency (30%)59%
- Community advantage (fewer free/reduced-price lunch) (25%)–
- Students per teacher (15%)13.7
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Millsboro Middle School by the official sources.
- Enrollment
- 726
- Students enrolled in the latest NCES directory year.
- Students per teacher
- 13.7
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 59%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 44%
- Share of tested students proficient or above (all students, all grades).
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Schools near Millsboro Middle School
Closest schools by straight-line distance, with their Success Index (US).
East Millsboro Elementary School
Millsboro · Public elementary · Grades K–5
820 students · 998 m away
Sussex Central High School
Georgetown · Public high · Grades 9–12
2,012 students · 5.6 km away
Indian River High School
Dagsboro · Public high · Grades 9–12
1,073 students · 7.3 km away
Clayton (John M.) Elementary School
Frankford · Public elementary · Grades K–5
446 students · 7.5 km away
Long Neck Elementary School
Millsboro · Public elementary · Grades K–5
712 students · 9.9 km away
Georgetown Elementary School
Georgetown · Public elementary · Grades K–5
825 students · 14 km away
Georgetown Middle School
Georgetown · Public middle · Grades 6–8
861 students · 14 km away
Sussex Academy
Georgetown · Charter other · Grades K–12
1,182 students · 14 km away
Similar schools
Public middle schools in Delaware with a comparable Enrollment.
duPont (Pierre S.) Middle School
Wilmington · Public middle · Grades 6–8
730 students
Delmar Middle School
Delmar · Public middle · Grades 5–8
732 students
Middle School of Innovation
Dover · Public middle · Grades 6–8
690 students
Shue-Medill Middle School
Newark · Public middle · Grades 6–8
763 students
duPont (H.B.) Middle School
Hockessin · Public middle · Grades 6–8
764 students
Selbyville Middle School
Selbyville · Public middle · Grades 6–8
770 students
Frequently asked questions
Is Millsboro Middle School a good school?
Millsboro Middle School has a Success Index (US) of 61.3 out of 100 (Top 50% of middle schools in United States) and ranks #8 of 40 in Delaware. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Millsboro Middle School rank in Delaware?
Millsboro Middle School ranks #8 of 40 middle schools in Delaware and #5186 of 15,369 nationally on the Success Index (US) (2025 data).
How many students attend Millsboro Middle School?
Millsboro Middle School had 726 students in 2025.
Is Millsboro Middle School a elementary school or a high school?
Millsboro Middle School is classified as a middle covering Grades 6–8. It is a public school.
What other schools are near Millsboro Middle School?
There are 8 schools within 15 km of Millsboro Middle School; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.