County Seat: Selby
Organized: 1873
Total Square Miles: 708
Persons/Sq Mile: 7
Demographics:
2018 Population: 5587
25 to 64 yrs. of age: 45.55%
65 yrs of age & older: 23.48%
Walworth County Courthouse located at 4304 4th Avenue in Selby, SD
PO Box 199
Selby, SD 575472
605-649-7878