About This Place
Lyndon is a village in Whiteside County, Illinois, United States. The population was 648 at the 2010 census, up from 566 at the 2000 census.
Lyndon is located at 41°43′1″N 89°55′23″W / 41.71694°N 89.92306°W / 41.71694; -89.92306 (41.716821, -89.923186).
According to the United States Census Bureau, the village has a total area of 0.8 square miles (2.1 km²), all of it land.