Bath township is located in Brown County, South Dakota. Bath township has a 2026 population of 686. Bath township is currently declining at a rate of -0.29% annually and its population has decreased by -1.72% since the most recent census, which recorded a population of 698 in 2020.
The median household income in Bath township is $86,250 with a poverty rate of 9.87%. The median age in Bath township is 43.7 years: 46 years for males, and 41.5 years for females. For every 100 females there are 119.7 males.