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 get a feel for it by knowing that during our research the earliest mention that we found (so far) was on a map dated 1956.

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

The area code for Dupo: (618)

The ZIP code for Dupo: 62239<5>

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 (with 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 <6>
• 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
• 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 <6>
• 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
• 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.<7> 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 <6>
• 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 <6>
• 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 <6>
• 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
• 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.<7> 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 <6>

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 on a map titled Road Map for Illinois (from Shell Oil, 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