# Curieus

Youth development nonprofit in Atherton, California 94027. EIN 83-2332724. Data as of November 8, 2026.

Page: https://backpr.com/find/nonprofit/832332724-curieus

## IRS facts

- Type: Youth development (IRS activity code O99)
- Tax status: 501(c)(3), contributions deductible, recognized 2024
- Source: IRS Business Master File, posted October 13, 2026: https://www.irs.gov/charities-non-profits/exempt-organizations-business-master-file-extract-eo-bmf

## How it compares

- Revenue rank: 3 of 4 youth development nonprofits in Atherton.
- Revenue $5,174 is in the bottom 10% of 1,664 youth development nonprofits in California; median $169,823.
- Source: IRS Business Master File, posted October 13, 2026; BackPR analysis.

## Local context

- San Mateo County, California: about 140,186 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
- 320 youth and community nonprofits in this directory in the county: 2.3 per 1,000 children.
- Licensed programs in Atherton: 8 licensed child care centers, 4 school-age programs: https://backpr.com/find/california/atherton
- California rules: https://backpr.com/resources/states/california

## Questions

**What is Curieus's EIN?**

Curieus's EIN (Employer Identification Number) is 83-2332724. 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 Curieus a nonprofit?**

Yes. The IRS lists Curieus in Atherton, California as tax-exempt under section 501(c)(3), recognized since 2024. 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 Curieus tax-deductible?**

Yes, the IRS lists gifts to Curieus 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 Curieus do?**

The IRS classifies Curieus as: Youth development. 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.