To cite package ‘tigris’ in publications use:

Walker K (2025). tigris: Load Census TIGER/Line Shapefiles. R package version 2.2.1.9000, https://github.com/walkerke/tigris.

Corresponding BibTeX entry:

  @Manual{,
    title = {tigris: Load Census TIGER/Line Shapefiles},
    author = {Kyle Walker},
    year = {2025},
    note = {R package version 2.2.1.9000},
    url = {https://github.com/walkerke/tigris},
  }