About 65,000 people.

Janesville is a green city in southern Wisconsin along the Rock River. It is nicknamed Wisconsin's Park Place because it has so many lovely parks and gardens.
You can wander the Rotary Botanical Gardens, meet farm animals at the Lincoln-Tallman house grounds, bike the river trails, and play at the many city parks.
With dozens of parks and the colorful Rotary Botanical Gardens, Janesville is a wonderful place to smell flowers and run on green grass.
The Rock River winds through the middle of town, offering paddling, fishing, and shady trails for a peaceful family day.