The Municipal Data System (MDS) is housed in the Department of Administration’s Division of
Intergovernmental Relations. The site is maintained by the Municipal Boundary
Review (MBR) team. The 2015-2017 Executive Budget included changes to the Secretary of State duties.
All municipal records regarding change in territory that were previously submitted to the Secretary of State
must now be submitted to the Department of Administration, and will be made available in the MDS.
Information on submitting municipal records to the Department of Administration is
MDS provides data and records of
changes to Wisconsin municipal boundaries and a directory of municipal
and county clerks. Data currently available includes all annexation ordinances recorded
by the Wisconsin Secretary of State’s Office since 2000, and some that are
earlier. Also included are petitions for annexation received by Municipal
Boundary Review since December 2002. Some sections of the site are not yet fully
populated with data, but will be updated with more data in the near future.
lists land proposed for annexation by cities and villages, and town land attachments.
lists annexation ordinances that transfer territory between municipalities.
has information about land exchange agreements between municipalities.
will list villages and cities incorporated since 2000.
will list information about municipalities that have formerly consolidated their operations.
will provide information about annexations under review by the Department.
is a directory of municipal and county clerks. Please send an email to
MBR Team if clerk contact information needs to be updated.
is a searchable database for each of the MDS sections with data that can be exported to various file formats.
Detailed information about the various means for changing
municipal boundaries and related Wisconsin State Statutes is available from the
Boundary Review Website. If you have questions about using the site data,
please click on Help at the top of any page.
If you have additional questions, or suggestions on improving the site,
please email us here: MBR Team. We look
forward to hearing from you.