Boundary Commission

St. Louis County, MO

"The Boundary Commission is responsible for the review of proposals affecting the boundaries of incorporated and unincorporated areas in St. Louis County." Learn More Contact Us
Upcoming Meetings finance committee

Via Zoom – email for link.

Click here for more information

1st Floor Conference Room
231 S Bemiston
Clayton, MO 63105

Click here for more information

Boundary Commission office closed for vacation.

The Boundary Commission office will be closed from May 31, 2023 through July 4, 2023. It will reopen on July 5, 2023.

If you have an urgent boundary change issue, please contact the Commission’s legal counsel – Mike Hart at 314-726-1900 or by email at

New Website Functionality!

Users can now register for an account. This allows users to be notified when updates are made to meetings, proposals, and/or map plans to which they’re subscribed.

More details on the benefits of having a User Account can be found by clicking the link.

Filing of annexation proposals for this proposal cycle ended July 1, 2022.

The Commission will accept Map Plans for the next proposal cycle beginning January 1, 2024 through July 1, 2024.

The Boundary Commission has returned to in-person meetings with the option to include a Zoom component if necessary. If you have any questions, please contact the Commission office via email

Interested in serving on the Boundary Commission? There are currently three Joint Appointment vacancies. To apply for a St. Louis County seat when there’s an opening, visit here to fill out their application. If interested in the Joint Appointment seats, send us an email

View information regarding the consolidation process for municipalities in St. Louis County.