Lyndon is a village in Whiteside County, Illinois, United States.

24.2% of all households were made up of individuals, and 14.0% had someone living alone who was 65 years of age or older.

Lyndon is the home of Wright's Easter Egg Hunt held in Richmond park.

The annual event is one of the largest free small-town Easter Egg hunts in Illinois with 4,000 people attending in 2018.

As part of the largest network of Protestant schools in the US, CLS provides an education for students from age 3 through 8th grade.