Welcome to Janesville ...
The city of Janesville is located in Rock County<1> and is the County Seat for Rock County.
Janesville was established in 1835.
From the Census Estimates for 2019, Janesville has a population of 64,497 people<2> (see below for details).
The community of Janesville is 850 feet [259 m] above sea level.<3>.
Time Zone: Janesville lies in the Central Time Zone (CST/CDT) and observes daylight saving time
Area Codes for Janesville: 608 & 353<4>
The ZIP codes for Janesville: 53545-53548<5>
Population Details ...
Taken from the 2019 Census Estimates, Janesville had an population of 64,497 people. This is an increase of 1.45% since the 2010 Census (or an increase of 8.4% since the 2000 Census).
At the time of the 2010 Census, Janesville had a population of 63,575 people (or 39.67% of the total population of Rock County). This makes Janesville the county's most populous community.
The population of Janesville represents 1.12% of the total population of Wisconsin (which has 5,686,986 people), making it the state's 10th most populous community.
With a 2010 count of 63,575 people, the population of Janesville increased 6.85% from the 2000 Census (which had a count of 59,498 people).
More information can be found on the Census Page for Janesville.
Communities Also Named Janesville ...
Using our Gazetteer, we found that there are 7 communities that are also named Janesville - they are located in California, Illinois, Iowa, Kansas, Minnesota, New York and Pennsylvania.
For more information, see our Tidbits & Trivia Page for Janesville.
Websites for Janesville ...
Official Website: www.ci.janesville.wi.us/
Communities near Janesville ...
We have created a list of 10 communities that are near Janesville.
- Beloit
(11 miles [17.7 km] to the south)
- Whitewater
(17 miles [27.4 km] to the northeast)
- Stoughton
(19 miles [30.6 km] to the northwest)
- Note: The GPS coordinates that we are using for Stoughton have been provided by the GNIS.<6> The coordinates still need to be verified.
- Jump to our Gazetteer entry for Stoughton
- Stoughton is located in Dane County
- Population from the 2020 Census: 13,218 people
- Fort Atkinson
(19 miles [30.6 km] to the northeast)
- Roscoe
(18 miles [29 km] to the south)
- Delavan
(19 miles [30.6 km] to the east)
- South Beloit
(13 miles [20.9 km] to the south)
- Note: The GPS coordinates that we are using for South Beloit have been provided by the GNIS.<6> The coordinates still need to be verified.
- Jump to our Gazetteer entry for South Beloit
- South Beloit is located in Winnebago County (IL)
- Population from the 2020 Census: 7,540 people
- Jump to TripAdvisor's Tourism page for South Beloit <8>
- Rockton
(15 miles [24.1 km] to the south)
- Milton
(7 miles [11.3 km] to the northeast)
- Edgerton
(10 miles [16.1 km] to the north)
To Help With Your Genealogy Research ...
We have a couple of sections for those tracing their genealogy.
We created a list of cemeteries that are in the area around Janesville. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Janesville.
Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Janesville. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Janesville.
We also have a detailed list of newspapers that have been published in the area around Janesville. Our list includes 35 papers. See our Newspapers Page for Janesville.
TripAdvisor Tourism Pages for Janesville ...
Looking for more information about Janesville? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you can read an overview with links that will help you find lodging, restaurants and attractions.
While we are unaware of a Tourism page that is specific to Janesville, there are neighboring communities that do have Tourism pages. A map of those communities can be found with our TripAdvisor Page for Janesville.
Adding Janesville to Our Gazetteer ...
We originally found mention of Janesville in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.
From our notes, the earliest published mention we've found (so far) for Janesville was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<9>
From that list, the Janesville post office opened in 1837.
For more details, see References and Mentions for Janesville.
Footnotes ...
| <1> | If you're interested in how the shape of Wisconsin's counties, including Rock, have changed over time, we recommend the Atlas of Historical County Boundaries. |
| <2> | Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Janesville. |
| <3> | The elevation is an estimate for the area around Janesville - it will be higher in some places and lower in others. |
| <4> | When there's a risk of an area code running out of phone numbers, an 'Overlay Area Code' is created that has the same geographic boundaries as the existing area code. In this case, the 608 code has been Overlayed with the 353 area code. New phone numbers in the Janesville area will be assigned with one of these codes: 608 or 353. As a result, placing a call in the Janesville area will require 10-digit dialing (where you enter both the area code and then the phone number). |
| <5> | ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a city (such as Janesville). When looking for a ZIP Code, whether Janesville or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
Our list of ZIP Codes for Janesville includes: 53545, 53546, 53547 & 53548. |
| <6> | The location has been supplied by the Geographic Names Information System - which is maintained by the U.S. Geological Survey (USGS). While these values should be definitive, we found that accuracy can vary and you should double-check the location if accuracy is required. |
| <7> | An 'estimated' location is one where we have been given GPS coordinates, but are unable to verify the accuracy of those coordinates. That said, we have some confidence that we have placed the marker near the actual location. A typical reason for being unable to verify a location is that it might be on private property or maybe historic and gone without an obvious trace. |
| <8> | While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program. |
| <9> | A copy of their list with background information can be found at:
https://cblevins.github.io/us-post-offices/data-biography/ |