# Chessathon

Recreational clubs nonprofit in Mill Valley, California 94941. EIN 42-3231726. Data as of November 8, 2026.

Page: https://backpr.com/find/nonprofit/423231726-chessathon

## IRS facts

- Type: Recreational clubs (IRS activity code N50)
- Tax status: 501(c)(3), contributions deductible, recognized 2026
- 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

- Marin County, California: about 47,838 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
- 184 youth and community nonprofits in this directory in the county: 3.8 per 1,000 children.
- Licensed programs in Mill Valley: 14 licensed child care centers, 4 school-age programs: https://backpr.com/find/california/mill-valley
- California rules: https://backpr.com/resources/states/california

## Questions

**What is Chessathon's EIN?**

Chessathon's EIN (Employer Identification Number) is 42-3231726. 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 Chessathon a nonprofit?**

Yes. The IRS lists Chessathon in Mill Valley, California as tax-exempt under section 501(c)(3), recognized since 2026. 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 Chessathon tax-deductible?**

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

The IRS classifies Chessathon as: Recreational clubs. 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.