Personal loans in San Mateo, CA
The first question in San Mateo is not the rate on offer but whether the payment fits; about 101,327 people live here under California lending law.
Verify the lender's California licence against the regulator named below before borrowing in San Mateo. San Mateo ranks 72nd of 482 places in California, with a population near 101,327. Lenders active in San Mateo report to a California supervisor, identified in the sourced rows below. A 2020-to-2023 comparison shows San Mateo down by about 4.1%. The next larger city is Hayward, CA about 12 miles away.
Where San Mateo stands
The figures below are San Mateo's own — Census population, land area and coordinates — followed by the California rules.
- Population: 101,327 — San Mateo ranks 72nd of 482 communities in California (US Census Bureau, Vintage 2023).
- Population trend: Roughly 4.1% fewer residents than the 2020 Census counted.
- Absolute change: 4,338 residents lost between 2020 and 2023.
- Size percentile: roughly 85% of California's places have fewer residents than San Mateo's 101,327.
- Population density: 8,351 people per square mile on 12.1 square miles of land.
- Land area: San Mateo covers 12.1 square miles, the 191st-largest area among California's 482 places.
- Water: San Mateo holds about 3.71 square miles, the 41st-largest water area in California.
- Share of state population: San Mateo's 101,327 residents are about 0.3% of California.
- National rank: San Mateo sits 318th by population among the 19,457 places in this dataset.
- Growth rank: San Mateo's 2020-to-2023 change ranks 378th of 482 places in California.
- Against the state trend: San Mateo's 4.1% change compares with a California average of -1.3% across its 482 places.
- Density rank: San Mateo is the 47th most densely settled place in California.
- Density vs California: San Mateo's 8,351 people per square mile compare with a state median of 3,455.
- Location: mapped by the US Census Bureau at 37.5603, -122.3106.
- Nearest larger cities: Hayward (12 mi); Oakland (15 mi); Sunnyvale (20 mi); Fremont (21 mi); Berkeley (21 mi). A branch is convenient; it is not what sets your APR.
- Nearest smaller places: Hillsborough (3 mi); Foster City (3 mi); Belmont (3 mi).
- Smaller places within 50 miles: 73 of them.
- At 100 miles: 21 larger Census places fall inside that radius.
The geography behind San Mateo
San Mateo's land area is about 12.1 square miles; a further 3.71 square miles is water. Spread across it are roughly 8,351 residents per square mile. The largest place in California, Los Angeles, lies about 328 miles away. Counting outward 50 miles, 12 larger communities surround San Mateo. The 100-mile radius contains 21 larger places.
Inside a San Mateo personal loan
Most loans made to San Mateo's 101,327 residents are unsecured, so nothing is pledged and the lender relies on your credit history. A lender serving San Mateo's 101,327 residents must disclose the APR and finance charge in writing before you sign. A longer term lowers the monthly payment on a San Mateo loan but raises total interest, so the smallest payment is not the cheapest loan.
The San Mateo borrowing checklist
Before you apply in San Mateo, a community of about 101,327, work through these steps:
- Pull your credit reports first and correct any error before a lender sees the file.
- Model the payment on the calculator before a lender models it for you.
- Shop at least three lenders and judge them on APR and total cost.
- Verify the lender's California licence with the regulator listed on this page.
- If the balances are already a strain, seek nonprofit credit counselling before adding a loan.
- Read the disclosure for an origination fee and any prepayment penalty before signing.
- Check that the monthly payment fits your budget next to your existing obligations.
The process is identical across California; what changes is your credit file, not the fact that San Mateo holds 101,327 people.
The California lending rules that reach San Mateo
These are California's sourced lending facts as they reach San Mateo's 101,327 residents; the state has no city-level rate rule.
| Rule | Detail | Source |
|---|---|---|
| State lending regulator | California Department of Financial Protection and Innovation (DFPI) Source says: "“Department” means the Department of Financial Protection and Innovation". | California Legislature — Financial Code § 23001 as of 2026-09-16 |
| Small-loan / installment lender licensing | Finance lender/broker license required from the Commissioner of Financial Protection and Innovation (California Financing Law) Source says: "No person shall engage in the business of a finance lender or broker without obtaining a license from the commissioner". | California Legislature — Financial Code § 22100 as of 2026-09-16 |
| 36% rate cap on mid-size consumer loans (AB 539) | Consumer loans of $2,500 to under $10,000: cap of 36% per annum simple interest plus the Federal Funds Rate Source says: "charges at a rate not exceeding an annual simple interest rate of 36 percent per annum plus the Federal Funds Rate". | California Legislature — Financial Code § 22304.5 as of 2026-09-16 |
San Mateo in state context
Within California, San Mateo holds roughly 0.3% of all residents, the 72nd-largest share among 482 places. Its 2020-to-2023 change ranks 378th of 482 California places, putting it near the 22th percentile for growth. At about 8,351 people per square mile, San Mateo is the 47th most densely settled place in California. By land area, its 12.1 square miles rank 191st of 482 places in California.
Common questions
What are my options in San Mateo if my credit is poor?
What loan size can I expect in San Mateo?
Do I have to pledge anything to borrow in San Mateo?
Does comparing loans in San Mateo cost me credit score points?
Nearby places
- Hillsborough, CA — population 10,883
- Belmont, CA — population 26,622
- Foster City, CA — population 32,180
- Burlingame, CA — population 29,910
- San Carlos, CA — population 28,862
- Millbrae, CA — population 22,087
- Redwood City, CA — population 80,996
- South San Francisco, CA — population 63,123