Dual Addresses in Unincorporated Lake County

The Lake County Board adopted a new address ordinance in July 2019 establishing a standard street address system which eliminates the use of one property having two addresses. You may hear this referred to as a "dual address." Lake County in cooperation with local fire, law enforcement and 9-1-1/emergency dispatch agencies is working to implement one official standard address for approximately 3,000 properties in unincorporated Lake County.  For some property owners, this may lead to an entirely new address for their property. 

Why are dual addresses being eliminated?

Dual addresses present serious obstacles for police, fire and ambulance services responding to an emergency. Inconsistent addresses in an area make it difficult for dispatchers and first responders to find homes when precious seconds might make the difference in saving lives, protecting your property or preventing a crime. Dual addresses can also pose issues for mail delivery, navigation systems and the retrieval of county records and can complicate business transactions such as refinancing a mortgage and applying for a passport or driver’s license.

Impacted areas and timeline

Approximately 3,000 properties within unincorporated Lake County have dual addresses. The areas being studied are shown on this map. 

Dual Address Map

Map of Areas

  1. 3rd St, Winthrop Harbor
  2. Acorn Ln, Libertyville
  3. American Way, Vernon Hills
  4. Arcadia Rd, Lake Bluff
  5. Arden Shore Rd, Lake Bluff
  6. Barron Blvd, Grayslake
  7. Bay Shore Dr, Lake Villa
  8. Bradley North, Libertyville
  9. Bradley South, Mettawa
  10. Bridle Trail Rd, Lake Forest
  11. Brookhill Rd, Libertyville
  12. Buckley Rd, Libertyville
  13. Bull Creek Area, Libertyville
  14. Center Ave, Libertyville
  15. Chevy Chase Rd, Mundelein
  16. Deep Lake Rd, Antioch
  17. Deerpath Rd, Lake Forest
  18. Del Mar Woods, Deerfield
  19. Diamond Lake Rd, Mundelein
  20. Ela Rd, Deer Park
  21. Elm Rd, Lake Forest
  22. Fairfield Rd, Round Lake
  23. Franklin St, Zion
  24. Frolic Ave, Waukegan
  25. Garland Rd, Wauconda
  26. Good Shepherd Hospital, Barrington
  27. Grand Ave, Lindenhurst
  28. Grandview Ave, Waukegan
  29. Half Day Rd, Deerfield
  1. Hanlon Rd, Libertyville
  2. Heiden Dr, Lake Bluff
  3. Hickory Knoll Area, Deerfield
  4. Horatio Gardens, Vernon Township
  5. IL Route 176, Mundelein
  6. IL Route 22, North Barrington
  7. Indian Trail, Barrington
  8. Inverrary Area East, Deerfield
  9. Inverrary Area Middle, Deerfield
  10. Inverrary Area West, Deefield
  11. Jackson Blvd, Grayslake
  12. Kemper Dr, Ela Township
  13. Knollwood Area, Lake Bluff
  14. Lake Front Dr, Zion
  15. Lake Shore Blvd, Wauconda
  16. Lakeview Ave, Wauconda
  17. Lewis Ave, Waukegan
  18. Little Melody, Mettawa
  19. Logan Ct, Zion
  20. Main St, Barrington
  21. Miller Rd, Barrington
  22. Milwaukee Ave, Deerfield
  23. Nike Pkwy, Vernon Hills
  24. North 22nd St, Waukegan
  25. North Skokie Hwy, Lake Bluff
  26. Northwest Hwy, Barrington
  27. Oak Knoll Rd, Barrington
  28. Oakwood Ave/University Ave, Waukegan
  1. Ogelsby Ave, Gurnee
  2. Old Barrington Rd, North Barrington
  3. Old Hickory Ln, Libertyville
  4. Old McHenry Rd, Hawthorn Woods
  5. Old Mill Rd, Lake Forest
  6. Pacific Ave, Waukegan
  7. Palm Beach Area, McHenry
  8. Park Rd, Gurnee
  9. Pillow Hill Rd, Spring Grove
  10. Quentin Rd, Lake Zurich
  11. Ravine Ln/Stone Marsh Ln, North Barrington
  12. Riverwoods Rd, Lake Forest
  13. Roberts Rd, Barrington
  14. Rollins Rd, Ingleside
  15. Roslyn Rd, Barrington
  16. Russell Rd, Winthrop Harbor
  17. Saint Mary's Rd, Libertyville
  18. Sheridan Rd, Zion
  19. Shore Acres Dr, Lake Bluff
  20. South Skokie Valley, Lake Bluff
  21. Sunnyview Rd/Bell Ln, Libertyville
  22. Sunset Rd/Elizabeth Rd, Barrington
  23. Terre Fair, Libertyville
  24. Timberlake Area
  25. Washington St, Park City
  26. Whitetail Trl, Barrington
  27. Willow Spring Rd, Long Grove
  28. Woodfield Ln, Libertyville

My property has two addresses. What do I do?

Lake County is working with local fire, law enforcement and 9-1-1/emergency dispatch agencies and the post office to assign you an official address. Once the work in an area is complete, the Chief County Assessment Office will send certified documentation to you to identify the official address you are to use. Refer to our frequently asked questions document (PDF) for additional information.

Ensure your official address number is visible from the street

Once you receive the certified documentation from the Chief County Assessment Office, you will need to ensure your official address number is posted at the access to your property in a prominent location from the street, such as on a mailbox or signpost at the front of your property. View this example on why it’s important to ensure your address is visible (PDF).

Mailbox 
Posting your address number in a visible location like a mailbox in front of your house makes it easier for first responders to find your home when seconds count. 


Mailbox 14


Make sure your address number can be seen driving from BOTH directions on your street. In this example, first responders would have a tough time determining if they are at the correct house. Having your address posted on your mailbox and on a signpost or on clearly on your home will help first responders find your property. 

Update your information and notify institutions 

Once you receive the certified documentation, you should make sure institutions have your correct address.

You May Need To Notify Lake County Will Notify
Illinois Secretary of State’s Office to update your driver’s license or State ID County offices, such as the Treasurer’s Office, County Clerk's Office and Lake County Public Works
Bank and other financial agencies Public safety agencies (including 9-1-1 centers)
Children's school U.S. Postal Service
Electric and gas company  
Friends and family  
Home insurance agency  
Magazine and subscription services  
Phone, cable and internet provider  
Tax agencies such as the IRS