NookLocal

Delaware County

Upper Darby School District

36.3
Academic Index · #106 of 112 (tie)
Browse all 136 homes for sale in Upper Darby

Academic outcomes (2024-25)

% proficient or advanced, official PDE district files. Marigold tick = state average.

PSSA English (gr. 3-8)25.1%PA 48.5%
PSSA Math (gr. 3-8)18.6%PA 41.7%
Keystone Algebra I18.9%PA 44.3%
Keystone Literature32.3%PA 62.1%
Keystone Biology31.2%PA 49.4%
4-year graduation rate82.9%PA 89.1%

The true tax picture

School millage (2025-26)
26.523 mills
Effective school tax (of market value)
1.45%/yr
Typical total (county + muni + school)
2.36%/yr
On a $450,000 purchase
≈ $10,605/yr
Median asking (136 active)
$260,000

Rates assume an assessment at Delaware County's current Common Level Ratio (54.64%). PA does not reassess on sale. Exact math for any price: the calculator.

Family & student support

Beyond test scores: official, public measures of student support and community context that families ask about. District- and county-level only; never a rating of an individual school, student, or home.

Support & services

U.S. Dept. of Education / NCES, 2020-21. Marigold figures are the PA average.

Special-education enrollment
19.6%PA avg 20.3%
Students per teacher
14.9:1PA avg 13.9:1
Students per school counselor
442:1PA avg 352:1 · recommended 250:1
Students per school psychologist
826:1PA avg 1,165:1 · recommended 500:1

Special-education enrollment is the share of students receiving IEP or related services: the support a district provides, not a drawback. Counselor and psychologist ratios compare against ASCA (250:1) and NASP (500:1) recommendations.

Delaware County: overdose context

Pennsylvania Department of Health. County-level, not specific to any school or district.

115drug-overdose deaths in 2024
20122024

Down from 170 the prior year and a peak of 257 in 2017. Recent years are provisional.

School climate & safety

70.9%regular attendance

Share of students present at least 90% of enrolled days, vs. 79.6% statewide. Enrollment-weighted across the district's schools. Pennsylvania Future Ready PA Index, 2024-25.

These figures describe districts and counties, not individual schools, students, or homes. They are official public data and may be self-reported, lag by a year or more, or be underreported. They are context for families, not a safety rating. Sources: U.S. Department of Education, NCES Common Core of Data (2020-21); Pennsylvania Department of Health; Pennsylvania Future Ready PA Index (2024-25).

Tax bill by municipality

MunicipalityMuni millageTotal millageEffective rateTax on $450,000
Clifton Heights Borough11.234 mills42.37 mills2.31%$10,417/yr
Millbourne Borough12 mills43.13 mills2.36%$10,605/yr
Upper Darby Township14.02 mills45.15 mills2.47%$11,102/yr

Common questions

Is Upper Darby a good school district?

Upper Darby scores 36.3 of 100 on the NookLocal Academic Index, #106 of 112 districts serving Bucks, Chester, Delaware, Montgomery, Berks, Lancaster, and the Lehigh Valley. Components (official 2025 PDE data): PSSA proficiency 22% (state ~45%), Keystone proficiency 28%, graduation rate 82.9% (state 89.1%). The index measures outcomes, not school effectiveness in isolation.

What are property taxes in Upper Darby School District?

The district levies 26.523 mills (2025-26) on Delaware County's assessment base, an effective school tax of about 1.45% of market value at the current Common Level Ratio. With county and typical municipal millage, the total runs about 2.36%, roughly $10,605 per year on a $450,000 purchase. Exact bills vary by municipality (2.31%–2.47% across 3) and by the home's actual assessment.

What towns are in Upper Darby School District?

NookLocal-covered towns served by Upper Darby: Clifton Heights Borough, Millbourne Borough, Upper Darby Township. The taxing municipalities are Clifton Heights Borough, Millbourne Borough, Upper Darby Township. A specific home's district is shown on every NookLocal listing.

Upper Darby vs. Southeast Delco: how do they compare?

Academically: Upper Darby 36.3 vs. Southeast Delco 36.3 on the Academic Index. On taxes: 2.36% vs. 2.54% of home value per year, about $10,605 vs. $11,446 on a $450,000 purchase. Full comparison on the school district value matrix.

What is the attendance rate in Upper Darby School District?

70.9% of Upper Darby students are regularly present (enrolled and attending at least 90% of school days) versus 79.6% statewide (Future Ready PA Index, 2024-25).

Does Upper Darby support students with IEPs and special needs?

19.6% of students receive special-education services (Pennsylvania average 20.3%), with about 442 students per school counselor and 826 per school psychologist. The Family & student support section above has the full breakdown.

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Academic data: PA Department of Education district-level files (2024-25). Tax data: county assessment offices and STEB. Estimates only. Verify with the district and county before transacting. Full methodology on the value matrix.

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