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Welcome to Rock Falls ...

The city of Rock Falls is located in Whiteside County<1>.

While we don't have a date for the founding of Rock Falls, you might consider that their post office opened  in 1868.

From the  Census Estimates for 2019, Rock Falls has a population of 8,746 people<2> (see below for details).

Rock Falls is 640 feet [195 m] above sea level.<3>.

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

Telephone area codes for Rock Falls: (815) & (779)<4>

The ZIP code for Rock Falls: 61071<5>

Population Details ...

Taken from the 2019 Census Estimates, Rock Falls had an population of 8,746 people. This is a decrease of 5.61% since the 2010 Census (or a decrease of 8.71% since the 2000 Census).

At the time of the 2010 Census, Rock Falls had a population of 9,266 people (which is 15.84% of the total population of Whiteside County). This makes Rock Falls the county's 2nd most populous community.

The population of Rock Falls represents 0.07% of the population of Illinois (which has 12,830,632 people), making it the state's 231st most populous community.

With a 2010 count of 9,266 people, the population of Rock Falls decreased 3.28% from the 2000 Census (with a count of 9,580 people).

More information can be found on the Census Page for Rock Falls.

Communities Also Named Rock Falls ...

Using our Gazetteer, we found that there are 3 communities that are also named Rock Falls - they are located in Iowa, Nebraska and Wisconsin.

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

Communities near Rock Falls ...

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

  • Dixon
    (11 miles [17.7 km] to the northeast)
  • Morrison
    (14 miles [22.5 km] to the west)
    • Note: The GPS coordinates that we are using for Morrison have been provided by the GNIS.<7> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Morrison
    • Morrison is located in Whiteside County
    • Population from the 2020 Census: 3,950 people
    • Jump to a Google Map centered on Morrison
    • Jump to TripAdvisor's Tourism page for Morrison <6>
  • Amboy
    (16 miles [25.7 km] to the east)
    • Note: The GPS coordinates that we are using for Amboy have been provided by the GNIS.<7> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Amboy
    • Amboy is located in Lee County
    • Population from the 2020 Census: 2,287 people
    • Jump to a Google Map centered on Amboy
    • Jump to TripAdvisor's Tourism page for Amboy <6>
  • Polo
    (15 miles [24.1 km] to the north)
  • Prophetstown
    (14 miles [22.5 km] to the southwest)
  • Walnut
    (16 miles [25.7 km] to the south)
  • Milledgeville
    (13 miles [20.9 km] to the north)
  • Tampico
    (11 miles [17.7 km] to the southwest)
  • Lyndon
    (12 miles [19.3 km] to the west)
    • Note: The GPS coordinates that we are using for Lyndon have been provided by the GNIS.<7> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Lyndon
    • Lyndon is located in Whiteside County
    • Population from the 2020 Census: 604 people
    • Jump to a Google Map centered on Lyndon
    • Jump to TripAdvisor's Tourism page for Lyndon <6>
  • Chadwick
    (19 miles [30.6 km] to the northwest)

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 Rock Falls. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Rock Falls.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Rock Falls. 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 Rock Falls.

We also have a detailed list of newspapers that have been published in the area around Rock Falls. Our list includes 7 papers. See our Newspapers Page for Rock Falls.

TripAdvisor Tourism Pages for Rock Falls ...

Looking for more information about Rock Falls? 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 Rock Falls, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Rock Falls.

Adding Rock Falls to Our Gazetteer ...

We originally found mention of Rock Falls 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 Rock Falls was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<8>

From that list, the Rock Falls post office opened in 1868.

We also found Rock Falls on a map (with an unknown title) dated 1870.

For more details, see References and Mentions for Rock Falls.

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

The official website for Whiteside County:

The official website for State of Illinois:

Footnotes ...

<1>If you're interested in how the shape of Illinois' counties, including Whiteside, 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 Rock Falls.
<3>The elevation is an estimate for the area around Rock Falls - it will be higher in some places and lower in others.
<4>Area code (779) is an overlay for area code (815).
<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 Rock Falls). When looking for a ZIP Code, whether Rock Falls or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<6>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<7>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.
<8>A copy of their list with background information can be found at:


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This page was last modified/updated: 07 Dec 2023