St. Onge Township is the sole township of Lawrence County, South Dakota, United States; the rest of the county is unorganized territory. The population was 326 as of the 2020 census. [1] It lies on the northern edge of the county.
44°33′44″N103°44′47″W / 44.56222°N 103.74639°W / 44.56222; -103.74639
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