# Marin County Swim Association

Swimming and water sports nonprofit in Mill Valley, California 94941. EIN 87-4789788. Data as of November 8, 2026.

Page: https://backpr.com/find/nonprofit/874789788-marin-county-swim-association

## Mission (the organization's own words)

> Provide the local community the opportunity to learn and play water polo

Source: Form 990, year ending Dec 2023: https://projects.propublica.org/nonprofits/organizations/874789788/202441239349301634/full

## IRS facts

- Type: Swimming and water sports (IRS activity code N67)
- 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

## Finances (IRS Form 990 e-file data)

| Year ending | Revenue | Expenses | Assets | Net assets | Employees | Volunteers | Source |
|---|---|---|---|---|---|---|---|
| Dec 2023 | $369,711 | $383,370 | $0 | $0 | 2 | - | [Form 990](https://projects.propublica.org/nonprofits/organizations/874789788/202441239349301634/full) |

Expense split, year ending Dec 2023: programs $383,370 (100%), management $0 (0%), fundraising $0 (0%).

Revenue sources, year ending Dec 2023: gifts and grants $369,711, program fees $0, investment income $0.

## How it compares

- Revenue rank: 2 of 10 amateur sports nonprofits in Mill Valley.
- Revenue $380,895 is higher than roughly 70 to 80% of 2,432 amateur sports nonprofits in California; median $143,571.
- Source: IRS Business Master File, posted October 13, 2026; BackPR analysis.

## 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 Marin County Swim Association's EIN?**

Marin County Swim Association's EIN (Employer Identification Number) is 87-4789788. 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 Marin County Swim Association a nonprofit?**

Yes. The IRS lists Marin County Swim Association in Mill Valley, California 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 Marin County Swim Association tax-deductible?**

Yes, the IRS lists gifts to Marin County Swim 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 Marin County Swim Association do?**

In its own words on its Form 990 for the year ending Dec 2023: "Provide the local community the opportunity to learn and play water polo" The IRS classifies it as: Swimming and water sports.

**How much money does Marin County Swim Association take in?**

For the year ending Dec 2023, Marin County Swim Association reported total revenue of $369,711 and total expenses of $383,370 on its Form 990 (IRS Form 990 e-file data).

---
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.