NookLocal

Delaware County

William Penn School District

33.6
Academic Index · #108 of 112
Browse all 80 homes for sale in William Penn

Academic outcomes (2024-25)

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

PSSA English (gr. 3-8)26.7%PA 48.5%
PSSA Math (gr. 3-8)16.0%PA 41.7%
Keystone Algebra I12.1%PA 44.3%
Keystone Literature34.7%PA 62.1%
Keystone Biology12.9%PA 49.4%
4-year graduation rate85.4%PA 89.1%

The true tax picture

School millage (2025-26)
32.86 mills
Effective school tax (of market value)
1.80%/yr
Typical total (county + muni + school)
2.66%/yr
On a $450,000 purchase
≈ $11,953/yr
Median asking (80 active)
$222,444

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
20.1%PA avg 20.3%
Students per teacher
14.7:1PA avg 13.9:1
Students per school counselor
309:1PA avg 352:1 · recommended 250:1
Students per school psychologist
928:1PA 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

64.4%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
Aldan Borough5.5 mills42.97 mills2.35%$10,565/yr
Lansdowne Borough7.3039 mills44.77 mills2.45%$11,009/yr
Yeadon Borough10.932 mills48.40 mills2.64%$11,901/yr
East Lansdowne Borough11.36 mills48.83 mills2.67%$12,006/yr
Colwyn Borough18.2 mills55.67 mills3.04%$13,688/yr
Darby Borough18.4 mills55.87 mills3.05%$13,737/yr

Common questions

Is William Penn a good school district?

William Penn scores 33.6 of 100 on the NookLocal Academic Index, #108 of 112 districts serving Bucks, Chester, Delaware, Montgomery, Berks, Lancaster, and the Lehigh Valley. Components (official 2025 PDE data): PSSA proficiency 21% (state ~45%), Keystone proficiency 20%, graduation rate 85.4% (state 89.1%). The index measures outcomes, not school effectiveness in isolation.

What are property taxes in William Penn School District?

The district levies 32.86 mills (2025-26) on Delaware County's assessment base, an effective school tax of about 1.80% of market value at the current Common Level Ratio. With county and typical municipal millage, the total runs about 2.66%, roughly $11,953 per year on a $450,000 purchase. Exact bills vary by municipality (2.35%–3.05% across 6) and by the home's actual assessment.

What towns are in William Penn School District?

NookLocal-covered towns served by William Penn: Aldan Borough, Colwyn Borough, Darby Borough, East Lansdowne Borough, Lansdowne Borough, Yeadon Borough. The taxing municipalities are Aldan Borough, Lansdowne Borough, Yeadon Borough, East Lansdowne Borough, Colwyn Borough, Darby Borough. A specific home's district is shown on every NookLocal listing.

William Penn vs. Southeast Delco: how do they compare?

Academically: William Penn 33.6 vs. Southeast Delco 36.3 on the Academic Index. On taxes: 2.66% vs. 2.54% of home value per year, about $11,953 vs. $11,446 on a $450,000 purchase. Full comparison on the school district value matrix.

What is the attendance rate in William Penn School District?

64.4% of William Penn students are regularly present (enrolled and attending at least 90% of school days) versus 79.6% statewide (Future Ready PA Index, 2024-25).

Does William Penn support students with IEPs and special needs?

20.1% of students receive special-education services (Pennsylvania average 20.3%), with about 309 students per school counselor and 928 per school psychologist. The Family & student support section above has the full breakdown.

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Track William Penn rates and inventory

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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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