815 Area Code - World Time Zone Map

World Time Zone Map Illinois Area Codes 815

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815 Area code

Central Time

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815 is an area code located in the state of Illinois, US. The largest city it serves is Rockford.

Location, time zone and map of the 815 area code

Local time

--:-- CST

Time difference to GMT/UTC

Standard time:	UTC/GMT -6:00 hours
No daylight saving time at the moment

Daylight Saving Time 2025 (Summer Time)

DST starts on Sunday 09 March 2025, 02:00 DST ends on Sunday 02 November 2025, 02:00

Time zone

The 815 area code lies within the Central Time (CT)

CST - Central Standard TimeCDT - Central Daylight Time when daylight saving time is being observed (from early March to early November)

Location

815 Area code location map

Major cities and communities served by area code 815

Winnebago County

• Rockford
• Loves Park
• Machesney Park
• Roscoe
• South Beloit
• Pecatonica
• New Milford
• Seward

Will County

• Joliet
• Bolingbrook
• Plainfield
• Romeoville
• New Lenox
• Lockport
• Crest Hill
• Frankfort
• Shorewood
• Channahon
• Manhattan
• Braidwood
• Wilmington
• Elwood

DeKalb County

• DeKalb
• Sycamore
• Sandwich
• Genoa
• Hinckley
• Kirkland
• Waterman
• Malta

McHenry County

• Crystal Lake
• McHenry
• Woodstock
• Harvard
• Lakemoor
• Richmond
• Hebron
• Union

Cook County

• Northbrook

Kankakee County

• Kankakee
• Bradley
• Manteno
• Momence
• Herscher
• Grant Park
• Chebanse
• Hopkins Park

Boone County

• Belvidere
• Poplar Grove
• Capron

Stephenson County

• Freeport
• Lena
• Pearl City
• Orangeville
• Cedarville
• Davis
• Dakota

La Salle County

• Ottawa
• Streator
• Peru
• La Salle
• Mendota
• Marseilles
• Sheridan
• Seneca
• Leland
• Tonica
• Grand Ridge
• Lostant
• Rutland

Lee County

• Dixon
• Amboy
• Franklin Grove
• Ashton
• Paw Paw
• Sublette
• Steward
• Harmon

Whiteside County

• Sterling
• Rock Falls
• Morrison
• Fulton
• Prophetstown
• Tampico
• Lyndon

Grundy County

• Morris
• Minooka
• Coal City
• Mazon

Livingston County

• Pontiac
• Fairbury
• Chatsworth
• Flanagan
• Odell
• Cullom
• Cornell
• Saunemin
• Long Point
• Reddick
• Strawn

Ogle County

• Rochelle
• Byron
• Oregon
• Mount Morris
• Polo
• Forreston
• Grand Detour

Bureau County

• Princeton
• Depue
• Walnut
• Ladd
• Sheffield
• Tiskilwa
• La Moille
• Ohio
• Manlius

Iroquois County

• Watseka
• Gilman
• Clifton
• Onarga
• Milford
• Cissna Park
• Ashkum
• Danforth
• Martinton
• Woodland
• Donovan
• Wellington
• Stockland

Jo Daviess County

• Galena
• Stockton
• Warren
• Hanover
• Elizabeth
• Scales Mound

Carroll County

• Savanna
• Mount Carroll
• Lanark
• Milledgeville
• Shannon
• Thomson
• Chadwick

McLean County

• Chenoa

Putnam County

• Granville
• Hennepin

Marshall County

• Wenona

Kendall County

• Lisbon

Ford County

• Cabery
• Kempton

Henry County

• Hooppole

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