Marathon County Uniform Addressing

When will the new addresses be released?

Between late March and November 2018, Marathon County's CPZ Department will be mailing an Official Notice of new Uniform Addresses to residents, landowners, and business owners whose addresses will be changing. This Official Notice will mailed in a series of batches between late March and November 2018, beginning on the east side of the county and moving west.

A few weeks before sign installation is projected to begin in a given village or town, Official Notices will be mailed, informing recipients of their new 6-digit address, as well as other details of the project. Recipients should keep their Official Notice for their records as they may need it later as proof of the address change.  

Following each mailing, the County will update a Sign-Installation Progress Map on the Maps page of this website, indicating which municipalities are completed, in progress, and next in line for sign installation.

At the same time, the County will post cross-reference tables (in the form of Excel spreadsheets) of the old/new addresses for the next municipalities scheduled to have their address and road-name signs installed by the County's contractor: Lange Enterprises. Additional address cross-reference tables will be uploaded to the website at intervals throughout the year matching the mailings of each batch of Offcial Notices. 

These downloadable spreadsheets will be essential to businesses, utility companies, schools, and other non-profits that will need to update their customer, client, and member databases with the address changes as they are released over the next several months. 

If you're a business that can utilize address ranges (e.g., delivery drivers), you can download an Excel file for 15 participating Eastern towns and the Village of Elderon. Address ranges for Western towns and villages will be posted later in the year.  

After you receive your Official Notice...

If you're having a blue, flag-style address sign installed (which most addresses are):

1. DIGGERS HOTLINE will be contacted by Lange Enterprises to spray-paint lines on your property to mark where it’s safe for them to install the signpost.
2. LANGE ENTERPRISES will install a new, blue, flag-style address sign on the side of your driveway.
3. After your sign is installed, you should use your NEW ADDRESS & begin notifying others of your address change.

If you're one of the few slotted to receive a black-and-white, building-mounted address sign:

1. LANGE ENTERPRISES will mail you a new, 6-digit, black-and-white address sign.
2. You'll use the included instructions to HANG YOUR NEW ADDRESS SIGN on your home or building, as indicated.
3. Once Lange Enterprises mails your new address sign, YOUR NEW ADDRESS IS ACTIVE and you should begin to USE YOUR NEW ADDRESS.

The project is estimated to be completed by November 2018.

NOTE: The Lange workers will try to stay on schedule for installing new address and road-name signs. However, if inclement weather or other unforseen circumstances arise, they may run behind our projected timeline. Please visit for schedule and project updates.


When will the new addresses be released?