Marble Rock, IA
Marble Rock is a city in Floyd County, Iowa, United States, along the Shell Rock River. The population was 326 at the 2000 census.
Marble Rock is located at 42°57′53″N 92°52′4″W / 42.96472°N 92.86778°W / 42.96472; -92.86778 (42.964695, -92.867786).
According to the United States Census Bureau, the city has a total area of 0.9 square miles (2.3 km²), of which, 0.8 square miles (2.2 km²) of it is land and 0.04 square miles (0.1 km²) of it (4.60%) is water.