COUNTY OF SAN MATEO: Single Audit Reports and Findings
COUNTY OF SAN MATEO filed 10 single audits between 2016 and 2025; the most recently observed auditor is MACIAS GINI & O'CONNELL LLP (2025), and the 2025 report lists 0 findings. Data as of 2026-09-18.
Data as of Sep 18, 2026 · Source: Federal Audit Clearinghouse (public data)
Single audits by year
One row per audit year as the Federal Audit Clearinghouse accepted it. The auditor named is the one observed on that filing; COUNTY OF SAN MATEO is recorded in REDWOOD CITY, California under EIN 946000532, and the Clearinghouse records it as a local government.
| Audit year | Fiscal year end | Federal expended | Threshold applied | Auditor observed | Findings | MW / SD | FAC report |
|---|---|---|---|---|---|---|---|
| 2025 | 2025-06-30 | $190,624,444 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 0 | — | 2025-06-GSAFAC-0000417794 |
| 2024 | 2024-06-30 | $187,370,736 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 0 | — | 2024-06-GSAFAC-0000362053 |
| 2023 | 2023-06-30 | $214,696,932 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 0 | — | 2023-06-GSAFAC-0000032569 |
| 2022 | 2022-06-30 | $253,195,987 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 1 | SD | 2022-06-CENSUS-0000131884 |
| 2021 | 2021-06-30 | $306,082,171 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 1 | SD | 2021-06-CENSUS-0000131884 |
| 2020 | 2020-06-30 | $182,336,473 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 0 | SD | 2020-06-CENSUS-0000131884 |
| 2019 | 2019-06-30 | $115,458,932 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 0 | — | 2019-06-CENSUS-0000131884 |
| 2018 | 2018-06-30 | $116,848,527 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 0 | — | 2018-06-CENSUS-0000131884 |
| 2017 | 2017-06-30 | $118,792,486 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 0 | — | 2017-06-CENSUS-0000131884 |
| 2016 | 2016-06-30 | $115,896,943 | $3,000,000 | MACIAS GINI & O'CONNELL LLP | 0 | SD | 2016-06-CENSUS-0000131884 |
Which federal programs did this organization report?
From the most recent accepted report. "Major" is the designation the auditor made under 2 CFR 200.518, not ours.
| ALN | Program | Expended | Major |
|---|---|---|---|
| 93.778 | MEDICAL ASSISTANCE PROGRAM | $25,792,267 | No |
| 21.027 | CORONAVIRUS STATE AND LOCAL FISCAL RECOVERY FUNDS | $19,193,236 | No |
| 10.561 | STATE ADMINISTRATIVE MATCHING GRANTS FOR THE SUPPLEMENTAL NUTRITION ASSISTANCE PROGRAM | $16,530,359 | No |
| 93.778 | MEDICAL ASSISTANCE PROGRAM | $9,423,876 | No |
| 93.558 | TEMPORARY ASSISTANCE FOR NEEDY FAMILIES | $7,451,194 | Yes |
| 93.558 | TEMPORARY ASSISTANCE FOR NEEDY FAMILIES | $6,962,041 | Yes |
| 93.563 | CHILD SUPPORT SERVICES | $6,618,875 | No |
| 93.658 | FOSTER CARE TITLE IV-E | $6,172,916 | No |
| 93.778 | MEDICAL ASSISTANCE PROGRAM | $5,860,606 | No |
| 93.959 | BLOCK GRANTS FOR PREVENTION AND TREATMENT OF SUBSTANCE ABUSE | $4,680,359 | Yes |
| 14.228 | COMMUNITY DEVELOPMENT BLOCK GRANTS/STATE'S PROGRAM AND NON-ENTITLEMENT GRANTS IN HAWAII | $4,231,490 | Yes |
| 93.994 | MATERNAL AND CHILD HEALTH SERVICES BLOCK GRANT TO THE STATES | $3,997,593 | Yes |
| 93.658 | FOSTER CARE TITLE IV-E | $3,775,911 | No |
| 93.870 | MATERNAL, INFANT AND EARLY CHILDHOOD HOME VISITING GRANT | $3,627,580 | Yes |
| 93.558 | TEMPORARY ASSISTANCE FOR NEEDY FAMILIES | $3,429,622 | Yes |
| 93.659 | ADOPTION ASSISTANCE | $3,420,389 | No |
| 10.557 | WIC SPECIAL SUPPLEMENTAL NUTRITION PROGRAM FOR WOMEN, INFANTS, AND CHILDREN | $3,212,743 | No |
| 95.001 | HIGH INTENSITY DRUG TRAFFICKING AREAS PROGRAM | $2,749,652 | No |
| 97.067 | HOMELAND SECURITY GRANT PROGRAM | $2,728,116 | No |
| 14.218 | COMMUNITY DEVELOPMENT BLOCK GRANTS/ENTITLEMENT GRANTS | $2,600,543 | No |
| 97.067 | HOMELAND SECURITY GRANT PROGRAM | $2,537,672 | No |
| 93.045 | SPECIAL PROGRAMS FOR THE AGING, TITLE III, PART C, NUTRITION SERVICES | $2,260,000 | No |
| 97.067 | HOMELAND SECURITY GRANT PROGRAM | $1,763,754 | No |
| 93.914 | HIV EMERGENCY RELIEF PROJECT GRANTS | $1,530,051 | No |
| 93.224 | HEALTH CENTER PROGRAM (COMMUNITY HEALTH CENTERS, MIGRANT HEALTH CENTERS, HEALTH CARE FOR THE HOMELESS, AND PUBLIC HOUSING PRIMARY CARE) | $1,503,397 | No |
What findings did the auditor report?
The reference and the requirement letter are the ones the auditor used. The finding text itself is not reproduced here; the FAC report linked above carries it in full.
The most recent report lists no finding.
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How we computed this
Every row comes from the Federal Audit Clearinghouse record named beside it, one report per audit year, with a resubmission superseding the filing it replaces. The auditor is the one named on that filing — it is not a statement about who audits COUNTY OF SAN MATEO now. Form 990 figures come from the IRS e-filed return named by its object id. This page exists because the organization filed at least two single audits, or one with a finding.
Cite this page
AuditRadar. “COUNTY OF SAN MATEO Single Audits and Findings (CA).” https://getauditradar.com/single-audits/ca/county-of-san-mateo-946000532/. Data as of 2026-09-18.