Welcome to Janesville ...

The city of Janesville is primarily located in Black Hawk County<1>. A portion of Janesville extends into Bremer County.

While we don't have a date for the founding of Janesville, you might get a feel for it by knowing that during our research the earliest mention that we found (so far) was in a book dated 1895.

From the  Census Estimates for 2019, Janesville has a population of 988 people<2> (see below for details).

Janesville is 910 feet [277 m] above sea level.<3>.

Time Zone: Janesville lies in the Central Time Zone (CST/CDT) and observes daylight saving time

Janesville is within the (319) area code.

The ZIP code for Janesville: 50647<4>

Population Details ...

Taken from the 2019 Census Estimates, Janesville had an population of 988 people. This is an increase of 6.24% since the 2010 Census (or an increase of 19.18% since the 2000 Census).

At the time of the 2010 Census, Janesville had a population of 930 people. This makes Janesville the county's 5th most populous community.

The population of Janesville represents 0.03% of the total population of Iowa (which has 3,046,355 people), making it the state's 298th most populous community.

With a 2010 count of 930 people, the population of Janesville increased 12.18% from the 2000 Census (with a count of 829 people).

More information can be found on the Census Page for Janesville.

Communities Also Named Janesville ...

Using our Gazetteer, we found that there are two Iowa communities named Janesville: This one is located in Black Hawk County and the other is located in Bremer County.

Beyond Iowa, there are 8 communities that are also named Janesville - they are located in California, Illinois, Kansas, Minnesota, New York, Pennsylvania and Wisconsin.

For more information, see our Tidbits & Trivia Page for Janesville.

Communities near Janesville ...

We have created a list of 10 communities that are near Janesville.

• Waterloo
  (12 miles [19.3 km] to the southeast)
  • Jump to our Gazetteer entry for Waterloo
  • Waterloo is located in Black Hawk County
  • Population from the 2020 Census: 67,292 people
  • Jump to TripAdvisor's Tourism page for Waterloo <5>
• Cedar Falls
  (7 miles [11.3 km] to the south)
  • Jump to our Gazetteer entry for Cedar Falls
  • Cedar Falls is located in Black Hawk County
  • Population from the 2020 Census: 40,231 people
  • Jump to TripAdvisor's Tourism page for Cedar Falls <5>
• Waverly
  (5 miles [8 km] to the north)
  • Jump to our Gazetteer entry for Waverly
  • Waverly is located in Bremer County
  • Population from the 2020 Census: 10,298 people
  • Jump to TripAdvisor's Tourism page for Waverly <5>
• Evansdale
  (14 miles [22.5 km] to the southeast)
  • Note: The GPS coordinates that we are using for Evansdale have been provided by the GNIS.<6> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Evansdale
  • Evansdale is located in Black Hawk County
  • Population from the 2020 Census: 4,734 people
  • Jump to TripAdvisor's Tourism page for Evansdale <5>
• Hudson
  (16 miles [25.7 km] to the south)
  • Jump to our Gazetteer entry for Hudson
  • Hudson is located in Black Hawk County
  • Population from the 2020 Census: 2,473 people
  • Jump to TripAdvisor's Tourism page for Hudson <5>
• Parkersburg
  (16 miles [25.7 km] to the west)
  • Note: The GPS coordinates that we are using for Parkersburg have been provided by the GNIS.<6> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Parkersburg
  • Parkersburg is located in Butler County
  • Population from the 2020 Census: 1,913 people
  • Jump to TripAdvisor's Tourism page for Parkersburg <5>
• Denver
  (6 miles [9.7 km] to the east)
  • Note: The GPS coordinates that we are using for Denver have been provided by the GNIS.<6> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Denver
  • Denver is located in Bremer County
  • Population from the 2020 Census: 1,879 people
  • Jump to TripAdvisor's Tourism page for Denver <5>
• Tripoli
  (15 miles [24.1 km] to the northeast)
  • Note: The GPS coordinates that we are using for Tripoli have been provided by the GNIS.<6> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Tripoli
  • Tripoli is located in Bremer County
  • Population from the 2020 Census: 1,375 people
  • Jump to TripAdvisor's Tourism page for Tripoli <5>
• Clarksville
  (13 miles [20.9 km] to the northwest)
  • Note: The GPS coordinates that we are using for Clarksville have been provided by the GNIS.<6> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Clarksville
  • Clarksville is located in Butler County
  • Population from the 2020 Census: 1,333 people
  • Jump to TripAdvisor's Tourism page for Clarksville <5>
• Shell Rock
  (7 miles [11.3 km] to the northwest)
  • Note: The GPS coordinates that we are using for Shell Rock have been provided by the GNIS.<6> The coordinates still need to be verified.
  • Jump to our Gazetteer entry for Shell Rock
  • Shell Rock is located in Butler County
  • Population from the 2020 Census: 1,268 people
  • Jump to TripAdvisor's Tourism page for Shell Rock <5>

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. 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.

In addition to the Tourism page for Janesville, there are neighboring communities that also have Tourism pages. More information about those communities can be found on 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 for Janesville was in the book titled Business Atlas and Shippers' Guide (1895).

We also found Janesville on a map titled Rand McNally Map of Iowa (1911).

For more details, see References and Mentions for Janesville.

Off-the-Road Links ...

Unfortunately, we don't know of a website for Janesville. If you can help, please contact us through our Feedback Page.

The official website for Black Hawk County: www.co.black-hawk.ia.us/

The official website for State of Iowa: https://www.iowa.gov/