Perched on a bluff above the Illinois River, Peoria is the largest city in central Illinois and the longtime headquarters city of Caterpillar. The entire region sits under a single area code, 309, which keeps local dialing simple. This guide covers the 309 area code, its coverage across Peoria County and central Illinois, dialing rules, major ZIP codes, and the scam calls residents should watch for.
Peoria Area Codes at a Glance
| Detail | Information |
|---|---|
| Primary Area Code(s) | 309 |
| Overlay Area Code(s) | None (309 only) |
| Time Zone | Central Time (CT) – CST / CDT |
| Major County | Peoria County |
| Dialing Format | 7 or 10-digit dialing |
Area Code Breakdown & District Mapping
309 – Central Illinois Code
Area code 309 was created in 1957 when it split from 217, serving west-central Illinois. It covers Peoria, Bloomington-Normal, Galesburg, Moline, and the surrounding region as a single, non-overlaid area code — one of the few major Illinois metros that still operates on one code.
Neighborhoods & Local Coverage
Peoria’s 309 code covers a historic river city defined by its dramatic bluffs. The revitalized Downtown and Warehouse District along the riverfront blend restaurants, breweries, and the Peoria Riverfront Museum, while the grand homes of the High Wine and Moss-Bradley districts showcase the city’s Gilded Age heritage.
Beyond the core, the same code reaches Peoria’s North Side around Junction City, the medical corridor anchored by OSF Saint Francis, and neighboring communities across the river like East Peoria, Morton, and Washington. Because central Illinois’ population is spread across a wide area, 309 has comfortably served the entire region for decades without an overlay.
Local Dialing Rules & International Format
Because 309 is a single area code with no overlay, Peoria still permits 7-digit dialing for local calls, though 10-digit dialing (area code + number) always works. To reach the state capital, Springfield, use area code 217.
To call Peoria from outside the United States, dial your country’s exit code, then the U.S. country code +1, followed by the 10-digit number (for example, +1 309 XXX-XXXX). From inside the U.S. and Canada, simply dial 1 before the 10-digit number for long-distance calls.
Major ZIP Codes Covered
The 309 service area spans many of Peoria’s core ZIP codes, including 61602, 61603, 61604, 61605, 61606, and 61614.
Spam & Scam Call Warnings in Peoria
Peoria residents report spoofed 309 robocalls impersonating utilities like Ameren, along with fake Caterpillar or employment-offer scams. Medicare and Social Security robocalls also target the area’s older residents.
| Scam Type | What to Watch For |
|---|---|
| Neighbor Spoofing | Calls that mimic a local 309 prefix to look familiar. |
| Utility / Toll Scams | Threats to shut off power or demand toll payment via gift cards. |
| IRS / Government | Robocalls claiming legal action — agencies never call to demand instant payment. |
Red flag: Any caller who pressures you to pay immediately with gift cards, wire transfers, or cryptocurrency is almost certainly running a scam. Hang up and verify through an official number.
↑ See the complete list of All US Area Codes by State for every code across the country.
Nearby & Related Illinois Cities
Frequently Asked Questions
What area code is Peoria, IL?
Peoria uses area code 309, which covers central and west-central Illinois.
Does Peoria have the same area code as Bloomington?
Yes. Peoria and Bloomington-Normal both use the 309 area code.
Do I have to dial 10 digits in Peoria?
Not necessarily. Because 309 has no overlay, 7-digit local dialing still works, but 10-digit dialing is always accepted.
What time zone is Peoria in?
Peoria observes Central Time (CST/CDT), like all of Illinois.
Is Peoria getting a new area code?
Not currently. Peoria and the 309 region remain on a single area code with no overlay, which is why 7-digit local dialing still works alongside 10-digit dialing across central Illinois.
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.