# Main Line Stem Association

Parent-teacher group (PTA or PTO) nonprofit in Bryn Mawr, Pennsylvania 19010. EIN 88-3769537. Data as of November 8, 2026.

Page: https://backpr.com/find/nonprofit/883769537-main-line-stem-association

## IRS facts

- Type: Parent-teacher group (PTA or PTO) (IRS activity code B94)
- Tax status: 501(c)(3), contributions deductible, recognized 2022
- Source: IRS Business Master File, posted October 13, 2026: https://www.irs.gov/charities-non-profits/exempt-organizations-business-master-file-extract-eo-bmf

## Local context

- Delaware County, Pennsylvania: about 127,662 children under 18 (U.S. Census Bureau, July 1, 2024): https://www2.census.gov/programs-surveys/popest/datasets/2020-2024/counties/asrh/cc-est2024-agesex-all.csv
- 298 youth and community nonprofits in this directory in the county: 2.3 per 1,000 children.
- Licensed programs in Bryn Mawr: 5 licensed child care centers: https://backpr.com/find/pennsylvania/bryn-mawr
- Pennsylvania rules: https://backpr.com/resources/states/pennsylvania

## Questions

**What is Main Line Stem Association's EIN?**

Main Line Stem Association's EIN (Employer Identification Number) is 88-3769537. It is the nine-digit number the IRS uses to identify the organization. Source: IRS Exempt Organizations Business Master File posted October 13, 2026.

**Is Main Line Stem Association a nonprofit?**

Yes. The IRS lists Main Line Stem Association in Bryn Mawr, Pennsylvania as tax-exempt under section 501(c)(3), recognized since 2022. This is from the IRS Business Master File posted October 13, 2026. Status can change, so check its current status on the IRS Tax Exempt Organization Search before you donate.

**Are donations to Main Line Stem Association tax-deductible?**

Yes, the IRS lists gifts to Main Line Stem Association as tax-deductible (IRS Business Master File posted October 13, 2026). How much you can deduct depends on your own taxes, and this is not tax advice. Check its current status on the IRS Tax Exempt Organization Search before you donate.

**What does Main Line Stem Association do?**

The IRS classifies Main Line Stem Association as: Parent-teacher group (PTA or PTO). It has not filed a Form 990 or 990-EZ with a mission statement that we have loaded.

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Data as of November 8, 2026. Sources: IRS Business Master File, IRS Form 990 series e-file data, U.S. Census Bureau. No officer or staff names are published.