Diamond Bar at a glance
- Population: roughly 52,041 people; 170th of 482 places in California (Census Vintage 2023 subcounty estimate).
- 2020 Census base: the 2020 count put the population at 55,068 (US Census Bureau).
- 2020 to 2023 change: about 5.5% below the 2020 Census base (US Census Bureau).
- Rank among California places: 170th out of 482 Census places (US Census Bureau).
- Size percentile: ahead of around 65% of California places in population terms (US Census Bureau).
- Coordinates: 34.0016, -117.8176 (US Census Bureau Gazetteer).
- Nearest larger cities: Pomona, CA (5 mi); West Covina, CA (6 mi); Chino Hills, CA (7 mi); Yorba Linda, CA (8 mi); Placentia, CA (9 mi); US Census Bureau population estimates.
- Nearest smaller communities: Walnut, CA (3 mi); Brea, CA (6 mi); Covina, CA (7 mi), each a US Census place.
What a personal loan costs in Diamond Bar
Personal loans are installment credit — one lump sum, repaid in equal monthly installments across a fixed term you agree to up front.
Judge an offer by its APR, which blends the interest rate with fees, and use the personal loan calculator to see the total cost.
The term is the lever: extend it and the payment falls while total interest climbs; shorten it and the reverse happens.
Work out the payment you can comfortably carry each month first, then borrow no more than that figure supports.
California lending rules that apply in Diamond Bar
The California rate caps and licensing rules that reach Diamond Bar are listed below, each with its source and retrieval date.
| Rule | Detail | Source |
|---|---|---|
| Payday lending status | Permitted under the California Deferred Deposit Transaction Law; max $300 face amount; fee ≤15%; term up to 31 days Source says: "The face amount of the check shall not exceed three hundred dollars ($300)"; "A fee for a deferred deposit transaction shall not exceed 15 percent of the face amount of the check" (Financial Code § 23036). | California Legislature — Financial Code § 23035 (and § 23036) 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 |
| 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 |
| 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 |
| Maximum legal interest rate (usury cap) | 7% per annum default; written contracts may set up to 10% per annum for consumer-purpose loans Source says: "shall be 7 percent per annum"; "for use primarily for personal, family, or household purposes, at a rate not exceeding 10 percent per annum". | California Legislature — California Constitution, Article XV, § 1 as of 2026-09-16 |
How to compare offers in Diamond Bar
Before you commit to a personal loan in Diamond Bar, work through these steps:
- Pull your free credit reports and dispute any error — it is the cheapest way to improve the rate you are offered.
- Run your figures through the personal loan calculator on this site so you know the payment before a lender quotes one.
- Pre-qualify with at least three lenders and compare the APR, not the interest rate.
- Check that the lender is licensed in California using the regulator named above.
- Read the disclosure for origination fees and any prepayment penalty before you sign.