U.S. Congressional Districts

The United States Congressional Districts in the state of Illinois. From the US Census Bureau's TIGER/Line shapefiles, 2023 vintage. These districts represent new district boundaries for the 2022 election (for the 118th Congress).

congress_sf

Format

A multipolygon sf object with 17 rows and 6 variables:

dist_num

Congressional District number. Integer.

dist_name

Name of the district (full). Character.

dist_name_short

Name of the district (short). Character.

cmap

Does the district overlap the 7-county CMAP region? Logical.

sqmi

Area in square miles. Double.

geometry

Feature geometry. sf multipolygon.

Source

US Census Bureau TIGER/Line

Details

Census Bureau description:

"Congressional Districts are the 435 areas from which people are elected to the U.S. House of Representatives. After the apportionment of congressional seats among the states based on decennial census population counts, each state with multiple seats is responsible for establishing congressional districts for the purpose of electing representatives. Each congressional district is to be as equal in population to all other congressional districts in a state as practicable. For the District of Columbia, Puerto Rico, and each Island Area, a separate code is used to identify the entire areas of these state-equivalent entities as having a single nonvoting delegate."

Examples

# Display the Congressional Districts with ggplot2
library(ggplot2)
ggplot(congress_sf) + geom_sf(aes(fill = cmap), lwd = 0.1) + theme_void()