Northbrook at a glance
- Population: 33,977 people, the 54th-largest place among Illinois's 1,294 Census places (US Census Bureau, Vintage 2023).
- 2020 Census base: 35,222 people (US Census Bureau, 2020 Census count).
- 2020 to 2023 change: about 3.5% below the 2020 Census base (US Census Bureau).
- Rank among Illinois places: 54th out of 1,294 Census places (US Census Bureau).
- Size percentile: larger than about 96% of the Census places in Illinois (US Census Bureau).
- Coordinates: 42.1287 latitude, -87.8352 longitude (US Census Bureau Gazetteer).
- Nearest larger cities within 120 miles: Glenview, IL (3 mi); Wheeling, IL (4 mi); Mount Prospect, IL (7 mi); Buffalo Grove, IL (7 mi); Des Plaines, IL (7 mi) (US Census Bureau).
- Nearest smaller towns: Deerfield, IL (3 mi); Northfield, IL (3 mi); Glencoe, IL (4 mi) (US Census Bureau).
What a personal loan costs in Northbrook
Most personal loans are unsecured, meaning no collateral is pledged, and they are repaid in equal installments over a fixed term.
Compare offers on APR rather than the headline rate — the APR includes most fees, and you can model the total with our personal loan calculator.
Stretching the term lowers the monthly payment but raises the total interest you pay, so the smallest payment is not automatically the cheapest loan.
Before you borrow, decide what the loan is for and whether the monthly payment fits a budget you can already meet without taking on new debt.
Illinois lending rules that apply in Northbrook
The sourced rows below are the rules a licensed lender must follow when lending in Illinois, and therefore in Northbrook.
| Rule | Detail | Source |
|---|---|---|
| Maximum legal interest rate (usury cap) | 9% annual percentage rate (general written-contract interest cap) Source says: "it shall be lawful for the parties to stipulate or agree that an annual percentage rate of 9%, or any less sum". | Illinois General Assembly (Illinois Compiled Statutes) as of 2026-09-16 |
| Payday lending status | Permitted under license; capped at 36% annual percentage rate (payday loans) Source says: "shall not contract for or receive a charge exceeding a 36% annual percentage rate ... for a payday loan". | Illinois General Assembly (Illinois Compiled Statutes) as of 2026-09-16 |
| Small-loan / installment lender licensing | Consumer Installment Loan Act license required from the Director of Financial Institutions (loans above 9% APR) Source says: "No person ... shall engage in the business of making loans of money ... except ... after first obtaining a license from the Director of Financial Institutions". | Illinois General Assembly (Illinois Compiled Statutes) as of 2026-09-16 |
| State lending regulator | Illinois Department of Financial and Professional Regulation (IDFPR), Division of Financial Institutions Source says: "DFI licenses, charters, and examines a wide variety of financial products and services including: Consumer and Sales Finance and Collection Agencies". | Illinois Department of Financial and Professional Regulation as of 2026-09-16 |
| Installment lender net-worth requirement | $30,000 minimum positive net worth (plus $25,000 surety bond) Source says: "every applicant shall prove ... that the applicant has and will maintain a positive net worth of a minimum of $30,000". | Illinois General Assembly (Illinois Compiled Statutes) as of 2026-09-16 |
How to compare offers in Northbrook
Before you commit to a personal loan in Northbrook, 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 Illinois using the regulator named above.
- Read the disclosure for origination fees and any prepayment penalty before you sign.