Iowa Black Hawk County Bremer County
Janesville
A city in Black Hawk County, Iowa — population 1,050 as of 2022.
Overnight
61°F
Mostly Clear
Sunday
80°F
Mostly Sunny
Sunday Night
60°F
Mostly Clear
Monday
81°F
Mostly Sunny
You know Janesville better than we do.
Add the places people actually go. Our editors review submissions before they publish — you'll need an account with access to send one.
Janesville by the numbers
Population
1,050Population figure, 2022
Households & income
- Median age
- 47
- Households
- 361
- Persons per household
- 2.5
- Median household income
- $103,542
- Median house value
- $221,700