Welcome to Dupo ...
The village of Dupo is located in Saint Clair County<1>.
The pronunciation of Dupo: DOO-poh<2>
While we don't have a date for the founding of Dupo, you might consider that their post office opened in 1906.
From the Census Estimates for 2019, Dupo has a population of 3,880 people<3> (see below for details).
Dupo is 410 feet [125 m] above sea level.<4>.
Time Zone: Dupo lies in the Central Time Zone (CST/CDT) and observes daylight saving time
Area Codes for Dupo: 618 & 730<5>
The ZIP code for Dupo: 62239<6>
Population Details ...
Taken from the 2019 Census Estimates, Dupo had an population of 3,880 people. This is a decrease of 6.23% since the 2010 Census (or a decrease of 1.35% since the 2000 Census).
At the time of the 2010 Census, Dupo had a population of 4,138 people. This makes Dupo the county's 14th most populous community.
The population of Dupo represents 0.03% of the population of Illinois (which has 12,830,632 people), making it the state's 371st most populous community.
With a 2010 count of 4,138 people, the population of Dupo increased 5.21% from the 2000 Census (which had a count of 3,933 people).
More information can be found on the Census Page for Dupo.
Communities near Dupo ...
We have created a list of 10 communities that are near Dupo.
- Saint Louis
(7 miles [11.3 km] to the north)- Jump to our Gazetteer entry for Saint Louis
- Saint Louis is located in Saint Louis City (MO)
- Population from the 2020 Census: 297,645 people
- Jump to TripAdvisor's Tourism page for Saint Louis <7>
- Google driving directions:
- From your current location to Saint Louis
- From Dupo to Saint Louis
- Florissant
(19 miles [30.6 km] to the north)- Jump to our Gazetteer entry for Florissant
- Florissant is located in Saint Louis County (MO)
- Population from the 2020 Census: 50,795 people
- Google driving directions:
- From your current location to Florissant
- From Dupo to Florissant
- Belleville
(12 miles [19.3 km] to the east)- Jump to our Gazetteer entry for Belleville
- Belleville is located in Saint Clair County
- Population from the 2020 Census: 40,536 people
- Jump to TripAdvisor's Tourism page for Belleville <7>
- Google driving directions:
- From your current location to Belleville
- From Dupo to Belleville
- University City
(12 miles [19.3 km] to the northwest)- Jump to our Gazetteer entry for University City
- University City is located in Saint Louis City (MO)
- Population from the 2020 Census: 34,049 people
- Google driving directions:
- From your current location to University City
- From Dupo to University City
- Ballwin
(19 miles [30.6 km] to the west)- Note: The GPS coordinates that we are using for Ballwin have been provided by the GNIS.<8> The coordinates still need to be verified.
- Jump to our Gazetteer entry for Ballwin
- Ballwin is located in Saint Louis County (MO)
- Population from the 2020 Census: 30,094 people
- Jump to TripAdvisor's Tourism page for Ballwin <7>
- O'Fallon
(16 miles [25.7 km] to the east)- Jump to our Gazetteer entry for O'Fallon
- O'Fallon is located in Saint Clair County
- Population from the 2020 Census: 29,606 people
- Jump to TripAdvisor's Tourism page for O'Fallon <7>
- Google driving directions:
- From your current location to O'Fallon
- From Dupo to O'Fallon
- Granite City
(12 miles [19.3 km] to the north)- Jump to our Gazetteer entry for Granite City
- Granite City is located in Madison County
- Population from the 2020 Census: 27,959 people
- Jump to TripAdvisor's Tourism page for Granite City <7>
- Google driving directions:
- From your current location to Granite City
- From Dupo to Granite City
- Kirkwood
(11 miles [17.7 km] to the west)- Jump to our Gazetteer entry for Kirkwood
- Kirkwood is located in Saint Louis County (MO)
- Population from the 2020 Census: 27,866 people
- Google driving directions:
- From your current location to Kirkwood
- From Dupo to Kirkwood
- Maryland Heights
(19 miles [30.6 km] to the northwest)- Note: The GPS coordinates that we are using for Maryland Heights have been provided by the GNIS.<8> The coordinates still need to be verified.
- Jump to our Gazetteer entry for Maryland Heights
- Maryland Heights is located in Saint Louis County (MO)
- Population from the 2020 Census: 26,895 people
- East Saint Louis
(8 miles [12.9 km] to the northeast)- Jump to our Gazetteer entry for East Saint Louis
- East Saint Louis is located in Saint Clair County
- Population from the 2020 Census: 25,776 people
- Jump to TripAdvisor's Tourism page for East Saint Louis <7>
- Google driving directions:
- From your current location to East Saint Louis
- From Dupo to East Saint Louis
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 Dupo. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Dupo.
Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Dupo. 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 Dupo.
We also have a detailed list of newspapers that have been published in the area around Dupo. See our Newspapers Page for Dupo.
TripAdvisor Tourism Pages for Dupo ...
Looking for more information about Dupo? 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 Dupo, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Dupo.
Adding Dupo to Our Gazetteer ...
We originally found mention of Dupo 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 Dupo was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<9>
X2X - From that list, the Dupo post office opened in 1906.
We also found Dupo on a map titled Shell Oil Road Map for Illinois (1956).
For more details, see References and Mentions for Dupo.
Off-the-Road Links ...
Unfortunately, we don't know of a website for Dupo. If you can help, please contact us through our Feedback Page.
The official website for Saint Clair County: www.co.st-clair.il.us/
The official website for State of Illinois: https://illinois.gov
Footnotes ...
| <1> | If you're interested in how the shape of Illinois' counties, including Saint Clair, have changed over time, we recommend the Atlas of Historical County Boundaries. |
| <2> | The pronunciation we've provided is our attempt to give a phonetic pronunciation for Dupo. While it might not be exactly right, hopefully it will be close. If we have it wrong or there's a better way to pronounce the name, please contact us through our Feedback Page. |
| <3> | Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Dupo. |
| <4> | The elevation is an estimate for the area around Dupo - it will be higher in some places and lower in others. |
| <5> | 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 618 code has been Overlayed with the 730 area code. New phone numbers in the Dupo area will be assigned with one of these codes: 618 or 730. As a result, placing a call in the Dupo area will require 10-digit dialing (where you enter both the area code and then the phone number). |
| <6> | 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 village (such as Dupo). When looking for a ZIP Code, whether Dupo or elsewhere, it's always best to check the website of the United States Postal Service (USPS). |
| <7> | While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program. |
| <8> | 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. |
| <9> | A copy of their list with background information can be found at: https://cblevins.github.io/us-post-offices/data-biography/ |