Churdan is a city in Greene County, Iowa, United States. The population was 418 at the 2000 census. It also has one of the last WeatherSTAR 4000 in the country.
Churdan is located at 42°9′18″N 94°28′36″W / 42.155°N 94.47667°W / 42.155; -94.47667 (42.154938, -94.476706).
According to the United States Census Bureau, the city has a total area of 2.1 square miles (5.5 km²), of which, 2.1 square miles (5.5 km²) of it is land and 0.47% is water.