A bill to require the United States Postal Service to designate ZIP Codes for certain communities.

Summary of S.4505 (119th Congress) — “A bill to require the United States Postal Service to designate ZIP Codes for certain communities”

Purpose and intent

• The bill directs the United States Postal Service (USPS) to designate a single, unique ZIP Code for each listed community.
• The stated deadline: the USPS must complete designation not later than 1 year after the date of enactment.

Key provisions

-SECTION 1: Designation of ZIP Codes
- USPS must designate a unique ZIP Code for each of the following communities (a total list includes communities across multiple states such as California, Colorado, Connecticut, Florida, Illinois, Indiana, Iowa, Kentucky, Louisiana, Minnesota, Nevada, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oklahoma, South Carolina, Texas, Utah, Virginia, Wyoming, and more).
- The bill enumerates 75 named communities (e.g., Canyon Lake (CA), Eastvale (CA), Hidden Hills (CA), Industry (CA), Irwindale (CA), North Tustin (CA), Rossmoor (CA), San Pablo (CA), Tehachapi (CA), Torrance (CA), Castle Pines (CO), Centennial (CO), Cherry Hills Village (CO), Frederick (CO), Greenwood Village (CO), Highlands Ranch (CO), Keystone (CO), Lone Tree (CO), Mountain Village (CO), Mt. Crested Butte (CO), Severance (CO), Silver Cliff (CO), Sterling Ranch (CO), Superior (CO), Telluride (CO), Scotland (CT), Coconut Creek (FL), Cooper City (FL), Deerfield Beach (FL), Fort Myers (FL), Lighthouse Point (FL), Miami Lakes (FL), Oakland Park (FL), Ocoee (FL), Parkland (FL), Village of Estero (FL), Wilton Manors (FL), Burr Ridge (IL), Carmel (IN), Noblesville (IN), Lawrence (IN), Westfield (IN), Zionsville (IN), Urbandale (IA), Camargo (KY), Louisiana State University (LA, Baton Rouge), Montz (LA), Springwater Township (MN), Quartzite Township (MN), Grass Valley (NV), Swanzey (NH), Kinnelon (NJ), Flanders (NY), Glendale (NY), Pendleton (NY), Riverside (NY), Wheatfield (NY), Weddington (NC), Green (OH), Hochatown (OK), North Enid (OK), Goose Creek (SC), Mauldin (SC), Fairview (TX), Fate (TX), Heath (TX), Josephine (TX), Murphy (TX), Northlake (TX), Parker (TX), Sargent (TX), Highland City (UT), Fairlawn (VA), Star Valley Ranch (WY), Mills (WY)).
- The bill does not specify any cost, funding mechanism, or criteria for how the USPS should handle these designations beyond issuing a single ZIP Code per community within the stated deadline.

Who would be affected

• The USPS would assign new ZIP Codes to the listed communities, replacing or supplementing existing ZIP Code designations.
• Residents, businesses, and local governments within those communities would experience changes in mailing addresses, potential updates to databases, and any systems relying on ZIP Code mappings (e.g., logistics, e-commerce, service delivery, demographic data).

Procedural and timeline aspects

• Introduced in the Senate on May 12, 2026.
• The bill was read twice and referred to the Committee on Homeland Security and Governmental Affairs.
• The key timeline constraint: designation of ZIP Codes for all listed communities must occur no later than 1 year after enactment.

Practical considerations and potential impact

• Address changes could affect mail delivery routing, shipping rates, and official records (civic, business, and governmental).
• Businesses with automated systems (billing, marketing, analytics) may need updates to reflect new ZIP Codes.
• The bill’s focus is limited to “designation of ZIP Codes” and does not outline associated funding, implementation steps, or transitional guidance, leaving such operational details to USPS guidelines after enactment.

Bottom line

S.4505 would compel USPS to designate a unique ZIP Code for each of 75 specified communities within one year of enactment. It establishes a concrete administrative mandate but does not specify funding or detailed implementation procedures.