Sangamon
geographical name
San·ga·mon
ˈsaŋ-gə-mən 
river about 250 miles (400 kilometers) long in central Illinois flowing southwest and west into the Illinois River
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“Sangamon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Sangamon. Accessed 27 Nov. 2025.
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