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Ontario, California

PTAs and PTOs in Ontario, CA

9 tax-exempt PTAs and PTOs based in Ontario, from IRS data.

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Parent-teacher group (PTA or PTO)

Liberty Elementary PTO

Ontario, CA 91761

Tax-exempt since 2014 · EIN 73-1676562

Parent-teacher group (PTA or PTO)

Vineyard Stem PTO

Ontario, CA 91764

Tax-exempt since 2024 · EIN 99-2906948

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Licensed child care and after-school programs in Ontario · California program rules

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Source: IRS Exempt Organizations Business Master File, posted October 13, 2026. We list 501(c)(3) organizations whose IRS activity code is youth development, amateur sports, camps and recreation, parent-teacher groups, children's services, child day care or arts education. We show the city and ZIP code only, never a street address or contact person. A listing is not an endorsement.