San Mateo County
California · FIPS 06081
According to CFPB HMDA 2024 application volume among U.S. counties, San Mateo County ranks #216 of 3,210, and #17 of 58 in California.
Mortgage lending activity in San Mateo County, California based on lender filings under the Home Mortgage Disclosure Act (HMDA). Data covers all applications received by HMDA-reporting institutions operating in this county during 2024. Why mortgages get denied walks the denial-reason codes that appear in books like this one.
Local mortgage market. San Mateo County, California saw 13,352 HMDA-reported mortgage applications in 2024. Lenders originated 7,568 of those loans and denied 1,995, producing a denial rate of 14.9% and an approval (origination) rate of 56.7%. The average loan amount was $965,594 at an average note rate of 7.10%, with applicants self-reporting average annual income of $38K. 326 distinct institutions reported mortgage activity in this county.
Borrower leverage and affordability signal. The loan-to-income ratio averages 25.4x, meaning typical borrowers took on mortgages of about 25.4 times their annual income. That ratio is a rough affordability signal: higher multiples imply tighter monthly budgets and greater exposure to rate or income shocks. See our methodology for how to read the denial rate against a local applicant pool. This page is informational data reporting, not financial, legal, or mortgage advice.
Lender concentration in San Mateo County
In San Mateo County, lead originator Bank of America NA funded only 8.5% of 7,568 originated loans, below the county fleet's lower tercile (~10.9% top-1 share). The top three reporters together hold 21.3% of the book, so shopping across channels still meets many active filers.
Counties With Similar Application Volume
Nationwide counties nearest to San Mateo County's 13,352 HMDA applications.
Counties With a Similar Average Loan
Nationwide counties nearest to San Mateo County's $965,594 average loan (deduped against volume peers).
Lenders active in San Mateo County
Bank of America NA funded 640 of the 7,568 loans originated in San Mateo County, 8.5% of the county. 326 lenders reported activity here.
| # | Lender | Originated | Market Share |
|---|---|---|---|
| 1 | Bank of America NA | 640 | 8.5% |
| 2 | United Wholesale Mortgage | 499 | 6.6% |
| 3 | Rocket Mortgage | 471 | 6.2% |
| 4 | Wells Fargo Bank NA | 469 | 6.2% |
| 5 | Us Bank, N.A. | 387 | 5.1% |
Source: Consumer Financial Protection Bureau (CFPB), Home Mortgage Disclosure Act (HMDA) 2024. County FIPS codes per U.S. Census Bureau standards.
Data from FFIEC / CFPB HMDA Snapshot National Loan-Level Dataset (2024). Provided for informational purposes only; does not constitute financial advice for San Mateo County borrowers.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainLender is rendered directly from CFPB HMDA federal source data, no number is typed in by an editor. This San Mateo County page draws directly on CFPB HMDA federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-10. HMDA figures are lender-filed application outcomes for a published reporting year - not creditworthiness scores, rate quotes, Loan Estimates, underwriting decisions, or mortgage advice.