AndreaBozzo/ceres-open-data-index huggingface dataset:
WI Assembly Districts (2012)

The Wisconsin 2011 redistricting plan was signed into law as Act 43 on August 9, 2011. The plan enacted by 2011 Act 43 was challenged before the U.S. District Court for the Eastern District of Wisconsin in Baldus et al vs. Brennan et al. On April 11, 2012, the court issued an order creating the new boundaries between Assembly Districts 8 and 9.
WI County Supervisory Districts (July 2025)

LTSB dissolves municipal ward data into county supervisory districts. Wisconsin municipal ward data was collected in July 2025. [[Attribute Definitions]]. This data has been collected in regards to state statute [15(4)(br)1]. 1. County clerks will transmit municipal, municipal ward, and county supervisory districts in GIS format to LTSB by January 15th and July 15th* per statute [5.15(4)(br)1]: * "...no later than January 15 and July 15 of each year*, the county clerk shall transmit to the Legislative Technology Services Bureau a report confirming the boundaries of each municipality, ward, and supervisory district in the county together with a map of the county, in an electronic format approved by the Legislative Technology Services Bureau. Each report shall be current to the nearest January 1 or July 1* preceding the date of the report”. (*with the exception of years ending in “01” where data collection will align closer to typical redistricting timelines of March and October 15) 2. Municipal clerks need to notify the county clerk within 5 days of any boundary change per statute [5.15(4)(b)]: * "Within 5 days after adoption or enactment of an ordinance or resolution under this section or any amendment thereto, the municipal clerk shall transmit one copy of the ordinance or resolution or the amendment to the county clerk of each county in which the municipality is contained, accompanied by the list and map specified in par. (a). Each copy shall identify the name of the municipality and the county or counties in which it is located." Municipal data collected in the January collections will be used by LTSB to update municipal boundaries the U.S. Census Bureau’s TIGER database via the Boundary Annexation Survey (BAS). Counties and municipalities are no longer required to submit boundary changes directly to the Census Bureau. LTSB will submit data to the Census Bureau for the state as a whole. Section [13.96(1)(b)] of the Wisconsin Statutes requires LTSB to “upon receipt of municipal boundary information at each reporting interval, reconcile and compile the information received to produce a statewide data base consisting of municipal boundary information for the entire state”. Section [13.96(1)(c)] states that LTSB shall “Participate, on behalf of this state, in geographic boundary information programs when offered by the U.S. bureau of the census”. LTSB will publish Municipal Wards, Municipal Boundaries (cities, towns, villages), and County Supervisory Districts to the [LTSB HUB Data Portal]. This data has been collected with the [LTSB GeoData Collector].
WI Cities, Towns, Villages (July 2025)

Wisconsin municipal ward data collected in July 2025 by LTSB that was dissolved into municipal boundaries (cities, towns, and villages). [[Attribute Definitions]]. This data has been collected in regards to state statute [15(4)(br)1]. 1. County clerks will transmit municipal, municipal ward, and county supervisory districts in GIS format to LTSB by January 15th and July 15th* per statute [5.15(4)(br)1]: * "...no later than January 15 and July 15 of each year*, the county clerk shall transmit to the Legislative Technology Services Bureau a report confirming the boundaries of each municipality, ward, and supervisory district in the county together with a map of the county, in an electronic format approved by the Legislative Technology Services Bureau. Each report shall be current to the nearest January 1 or July 1* preceding the date of the report”. (*with the exception of years ending in “01” where data collection will align closer to typical redistricting timelines of March and October 15) 2. Municipal clerks need to notify the county clerk within 5 days of any boundary change per statute [5.15(4)(b)]: * "Within 5 days after adoption or enactment of an ordinance or resolution under this section or any amendment thereto, the municipal clerk shall transmit one copy of the ordinance or resolution or the amendment to the county clerk of each county in which the municipality is contained, accompanied by the list and map specified in par. (a). Each copy shall identify the name of the municipality and the county or counties in which it is located." Municipal data collected in the January collections will be used by LTSB to update municipal boundaries the U.S. Census Bureau’s TIGER database via the Boundary Annexation Survey (BAS). Counties and municipalities are no longer required to submit boundary changes directly to the Census Bureau. LTSB will submit data to the Census Bureau for the state as a whole. Section [13.96(1)(b)] of the Wisconsin Statutes requires LTSB to “upon receipt of municipal boundary information at each reporting interval, reconcile and compile the information received to produce a statewide data base consisting of municipal boundary information for the entire state”. Section [13.96(1)(c)] states that LTSB shall “Participate, on behalf of this state, in geographic boundary information programs when offered by the U.S. bureau of the census”. LTSB will publish Municipal Wards, Municipal Boundaries (cities, towns, villages), and County Supervisory Districts to the [LTSB HUB Data Portal]. This data has been collected with the [LTSB GeoData Collector].
WI Supervisory Districts (Jan 2026)

Wisconsin County Supervisory districts collected in February 2026. [[Attribute Definitions]]. U.S. Census Bureau delayed delivery of data so collection was postponed from January to February this year. This data has been collected in regards to state statute [15(4)(br)1]. 1. County clerks will transmit municipal, municipal ward, and county supervisory districts in GIS format to LTSB by January 15th and July 15th* per statute [5.15(4)(br)1]: * "...no later than January 15 and July 15 of each year*, the county clerk shall transmit to the Legislative Technology Services Bureau a report confirming the boundaries of each municipality, ward, and supervisory district in the county together with a map of the county, in an electronic format approved by the Legislative Technology Services Bureau. Each report shall be current to the nearest January 1 or July 1* preceding the date of the report”. 2. Municipal clerks need to notify the county clerk within 5 days of any boundary change per statute [5.15(4)(b)]: * "Within 5 days after adoption or enactment of an ordinance or resolution under this section or any amendment thereto, the municipal clerk shall transmit one copy of the ordinance or resolution or the amendment to the county clerk of each county in which the municipality is contained, accompanied by the list and map specified in par. (a). Each copy shall identify the name of the municipality and the county or counties in which it is located." Municipal data collected in the January collections will be used by LTSB to update municipal boundaries the U.S. Census Bureau’s TIGER database via the Boundary Annexation Survey (BAS). Counties and municipalities are no longer required to submit boundary changes directly to the Census Bureau. LTSB will submit data to the Census Bureau for the state as a whole. Section [13.96(1)(b)] of the Wisconsin Statutes requires LTSB to “upon receipt of municipal boundary information at each reporting interval, reconcile and compile the information received to produce a statewide data base consisting of municipal boundary information for the entire state”. Section [13.96(1)(c)] states that LTSB shall “Participate, on behalf of this state, in geographic boundary information programs when offered by the U.S. bureau of the census”. LTSB will publish Municipal Wards, Municipal Boundaries (cities, towns, villages), and County Supervisory Districts to the [LTSB GIS Hub website]. This data has been collected with the [LTSB GeoData Collector]. *with the exception of years ending in “01” where data collection will align closer to typical redistricting timelines of March and October 15
WI Cities, Towns, and Villages (Jan 2026)

Wisconsin municipal ward data collected in February 2026 by LTSB that was dissolved into municipal boundaries (cities, towns, and villages). [[Attribute Definitions]]. U.S. Census Bureau delayed delivery of data so collection was postponed from January to February this year. This data has been collected in regards to state statute [15(4)(br)1]. 1. County clerks will transmit municipal, municipal ward, and county supervisory districts in GIS format to LTSB by January 15th and July 15th* per statute [5.15(4)(br)1]: * "...no later than January 15 and July 15 of each year*, the county clerk shall transmit to the Legislative Technology Services Bureau a report confirming the boundaries of each municipality, ward, and supervisory district in the county together with a map of the county, in an electronic format approved by the Legislative Technology Services Bureau. Each report shall be current to the nearest January 1 or July 1* preceding the date of the report”. (*with the exception of years ending in “01” where data collection will align closer to typical redistricting timelines of March and October 15) 2. Municipal clerks need to notify the county clerk within 5 days of any boundary change per statute [5.15(4)(b)]: * "Within 5 days after adoption or enactment of an ordinance or resolution under this section or any amendment thereto, the municipal clerk shall transmit one copy of the ordinance or resolution or the amendment to the county clerk of each county in which the municipality is contained, accompanied by the list and map specified in par. (a). Each copy shall identify the name of the municipality and the county or counties in which it is located." Municipal data collected in the January collections will be used by LTSB to update municipal boundaries the U.S. Census Bureau’s TIGER database via the Boundary Annexation Survey (BAS). Counties and municipalities are no longer required to submit boundary changes directly to the Census Bureau. LTSB will submit data to the Census Bureau for the state as a whole. Section [13.96(1)(b)] of the Wisconsin Statutes requires LTSB to “upon receipt of municipal boundary information at each reporting interval, reconcile and compile the information received to produce a statewide data base consisting of municipal boundary information for the entire state”. Section [13.96(1)(c)] states that LTSB shall “Participate, on behalf of this state, in geographic boundary information programs when offered by the U.S. bureau of the census”. LTSB will publish Municipal Wards, Municipal Boundaries (cities, towns, villages), and County Supervisory Districts to the [LTSB GIS Hub website]. This data has been collected with the [LTSB GeoData Collector]. *with the exception of years ending in “01” where data collection will align closer to typical redistricting timelines of March and October 15.
WI Municipal Wards (2026)

Wisconsin municipal ward data collected in February 2026 by LTSB. [[Attribute Definitions]]. U.S. Census Bureau delayed delivery of data so collection was postponed from January to February this year. This data has been collected in regards to state statute [15(4)(br)1]. 1. County clerks will transmit municipal, municipal ward, and county supervisory districts in GIS format to LTSB by January 15th and July 15th* per statute [5.15(4)(br)1]: * "...no later than January 15 and July 15 of each year*, the county clerk shall transmit to the Legislative Technology Services Bureau a report confirming the boundaries of each municipality, ward, and supervisory district in the county together with a map of the county, in an electronic format approved by the Legislative Technology Services Bureau. Each report shall be current to the nearest January 1 or July 1* preceding the date of the report”. (*with the exception of years ending in “01” where data collection will align closer to typical redistricting timelines of March and October 15) 2. Municipal clerks need to notify the county clerk within 5 days of any boundary change per statute [5.15(4)(b)]: * "Within 5 days after adoption or enactment of an ordinance or resolution under this section or any amendment thereto, the municipal clerk shall transmit one copy of the ordinance or resolution or the amendment to the county clerk of each county in which the municipality is contained, accompanied by the list and map specified in par. (a). Each copy shall identify the name of the municipality and the county or counties in which it is located." Municipal data collected in the January collections will be used by LTSB to update municipal boundaries the U.S. Census Bureau’s TIGER database via the Boundary Annexation Survey (BAS). Counties and municipalities are no longer required to submit boundary changes directly to the Census Bureau. LTSB will submit data to the Census Bureau for the state as a whole. Section [13.96(1)(b)] of the Wisconsin Statutes requires LTSB to “upon receipt of municipal boundary information at each reporting interval, reconcile and compile the information received to produce a statewide data base consisting of municipal boundary information for the entire state”. Section [13.96(1)(c)] states that LTSB shall “Participate, on behalf of this state, in geographic boundary information programs when offered by the U.S. bureau of the census”. LTSB will publish Municipal Wards, Municipal Boundaries (cities, towns, villages), and County Supervisory Districts to the [LTSB GIS HUB website]. This data has been collected with the [LTSB GeoData Collector]. *with the exception of years ending in “01” where data collection will align closer to typical redistricting timelines of March and October 15.
WI Assembly Districts (2002)

2002 Assembly Districts: Districts as created by the Federal Court Redistricting Decision dated May 22, 2002. The districts were effective as of May 30, 2002, when the U.S. District Court for the Eastern District of Wisconsin issued its decision in Baumgart et al. v. Wendelberger et al. The plan used the statewide municipal ward dataset created by local officials using U.S. Census Bureau's TIGER 2000 data and annexations up to August 1, 2001.
WI Assembly Districts (2024)

Wisconsin Assembly Districts. These legislative Districts were passed as [2023 Senate Bill 488] by the Wisconsin State Assembly and the State Senate on February 13, 2024, and then enacted by the Wisconsin Governor on Monday, February 19, 2024, as [2023 Wisconsin Act 94]. Legislative district assignments of U.S. Census Blocks were appended to the 2020 U.S. Census TIGER Block geography, and then spatially dissolved by district to form the district boundaries.
WI Senate Districts (2024)

Wisconsin Senate Districts 2024. Legislative Districts were passed as [2023 Senate Bill 488] by the Wisconsin State Assembly and the State Senate on February 13, 2024, and then enacted by the Wisconsin Governor on Monday, February 19, 2024, as [2023 Wisconsin Act 94]. Legislative district assignments of U.S. Census Blocks were appended to the 2020 U.S. Census TIGER Block geography, and then spatially dissolved by district to form the district boundaries.
WI Municipal Wards (July 2025)

Wisconsin municipal ward data collected in July 2025 by LTSB. [[Attribute Definitions]]. This data has been collected in regards to state statute [15(4)(br)1]. 1. County clerks will transmit municipal, municipal ward, and county supervisory districts in GIS format to LTSB by January 15th and July 15th* per statute [5.15(4)(br)1]: 2. Municipal clerks need to notify the county clerk within 5 days of any boundary change per statute [5.15(4)(b)]: Municipal data collected in the January collections will be used by LTSB to update municipal boundaries the U.S. Census Bureau’s TIGER database via the Boundary Annexation Survey (BAS). Counties and municipalities are no longer required to submit boundary changes directly to the Census Bureau. LTSB will submit data to the Census Bureau for the state as a whole. Section [13.96(1)(b)] of the Wisconsin Statutes requires LTSB to “upon receipt of municipal boundary information at each reporting interval, reconcile and compile the information received to produce a statewide data base consisting of municipal boundary information for the entire state”. Section [13.96(1)(c)] states that LTSB shall “Participate, on behalf of this state, in geographic boundary information programs when offered by the U.S. bureau of the census”. LTSB will publish Municipal Wards, Municipal Boundaries (cities, towns, villages), and County Supervisory Districts to the [LTSB HUB Data Portal]. This data has been collected with the [LTSB GeoData Collector].
Wisconsin Redistricting Wards (2022)

This data was collected as part of the 2021 local redistricting process in the State of Wisconsin. Ward data was submitted by local redistricting officials between August 2021 and February 2022 based on the U.S. Census TIGER 2020 Block geography with 2020 US Census PL 94-171 Demographic Data. Ward geography was divided into multiple features by the legislative and congressional districts. Wards have not yet been re-enumerated by local officials to reflect this division.