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Marengo is a city in and the county seat of Iowa County, Iowa, United States. It has served as the county seat since August 1845, even though it was not incorporated until July 1859. The population was 2,528 in the 2010 census, a decline from 2,535 in the 2000 census.
Marengo's longitude and latitude coordinates
in decimal form are 41.797227, -92.069550.
According to the United States Census Bureau, the city has a total area of 2.2 square miles (5.6 km²), of which, 2.1 square miles (5.4 km²) of it is land and 0.1 square miles (0.2 km²) of it (2.78%) is water.