St. Bridget township is located in Marshall County, Kansas. St. Bridget township has a 2026 population of 136. St. Bridget township is currently declining at a rate of 0% annually and its population has decreased by -1.45% since the most recent census, which recorded a population of 138 in 2020.
The median age in St. Bridget township is 61.2 years: 61.2 years for males, and 61.3 years for females. For every 100 females there are 68.2 males.