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Green Rock

1. Green Rock, Illinois, United States [City]; population was 2,615 in 1990; housing units was 934 in 1990; location is 41°28'N 90°22'W; land area is 0.65 square miles (414 acres); FIPS code is 31485 [SourceCBP]
2. Green Rock, Illinois, United States [Populated Place] is in Henry County; location is 41°28'23"N 90°21'27"W [SourceGSP]