CIPZIP Act of 2025

S. 3175 would create a temporary, seven-year pilot program letting the U.S. Postal Service accept money, property, or services from state, local, or Tribal governments to cover the net costs of changing or realigning a ZIP Code boundary. Currently, USPS can deny such requests based on cost; under this bill, if cost is the only reason for a denial and the requesting government is willing and able to cover that cost through an agreement, USPS would have to accept the deal and grant the request. When USPS denies a boundary-change request for cost reasons, it would be required to tell the requester about the pilot program, give a cost estimate, and allow at least 30 days for the requester to propose a cost-sharing agreement.

The bill mainly affects USPS, which gains new authority and reporting duties, and state, local, and Tribal governments seeking ZIP Code boundary changes (often sought for reasons like community identity, service delivery, or economic development), who would gain a clearer path to get such changes approved by offering to cover the cost. It also requires the Postal Regulatory Commission to submit annual reports to relevant House and Senate committees on how the program is used, and requires USPS to report to any Member of Congress, on request, the reasons behind a specific denial.

The bill was introduced in the Senate on November 18, 2025, by Senator James Lankford (R-OK) and referred to the Committee on Homeland Security and Governmental Affairs. On August 6, 2026, the committee ordered it reported favorably with an amendment in the nature of a substitute. It would next go to the full Senate for consideration; it has not yet passed either chamber.

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