Meanings
proper noun
- One of 102 counties in Illinois, United States. County seat: Rock Island.
Origin
Named after an island in the Mississippi River, now known as Arsenal Island.
Full word history & related roots →Cite this entry
APA
Rock Island County. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Rock%20Island%20County
MLA
“Rock Island County.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Rock%20Island%20County. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “Rock Island County,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Rock%20Island%20County.
Source: Rock Island County on Wiktionary, CC BY-SA 4.0.