Michigan County Subdivision Boundaries for 2021 Census

2021 boundaries for county subdivisions in Michigan, derived from the U.S. Census Bureau's MAF/TIGER Database. This dataset includes legally-recognized minor civil divisions (MCDs), statistical census county divisions (CCDs), and unorganized territories, providing a seamless geographic framework for the state.

Use Cases

• Analyze the distribution and area of Minor Civil Divisions (MCDs) versus Census County Divisions (CCDs) within Michigan counties.
• Join demographic or economic data from other Census sources using the geographic identifiers for county subdivisions.
• Create thematic maps showing the boundaries of towns, townships, and unorganized territories for regional planning.
• Verify the legal boundaries of county subdivisions as reported through the 2021 Boundary and Annexation Survey (BAS).

Strengths

• Boundaries are based on the Census Bureau's authoritative MAF/TIGER Database, ensuring national topological consistency.
• Data reflects legal and administrative boundaries as reported through official programs like the 2021 Boundary and Annexation Survey (BAS) and the 2020 Participant Statistical Areas Program (PSAP).
• Provides complete coverage of Michigan, including all county subdivisions such as MCDs, CCDs, and unorganized territories.

Limitations

• The dataset does not include attribute tables (e.g., population, area) beyond basic geographic identifiers, requiring joins with other Census data for analysis.
• Boundary updates are tied to the decennial census and annual BAS, so changes after January 1, 2021, are not reflected.

Provenance

Source

U.S. Census Bureau, Department of Commerce

Collection Method

Extracted from the Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database.

Time Range

Boundaries are primarily as of January 1, 2021.

Freshness

Data reflects boundaries as of January 1, 2021; the dataset was last updated on the platform in November 2022.

Geography

State of Michigan, United States.