New Surprise Valley township is located in Mellette County, South Dakota. New Surprise Valley township has a 2026 population of 7. New Surprise Valley township is currently growing at a rate of 16.67% annually and its population has increased by 40% since the most recent census, which recorded a population of 5 in 2020.
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There are 0 adults, (0 of whom are seniors) in New Surprise Valley township.
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