Timberlane (locally known as Timberline) is a village in Boone County, Illinois, United States.

It is part of the Rockford, Illinois Metropolitan Statistical Area.

[3] As of the 2020 census[5] there were 906 people, 345 households, and 319 families residing in the village.

There were 304 housing units at an average density of 172.24 per square mile (66.50/km2).

6.38% of all households were made up of individuals, and 3.48% had someone living alone who was 65 years of age or older.