Summary for Mount Vernon
About Mount Vernon (Click for our profile page)
Located in: Jefferson County (see below)
Pronunciation: VER-nuhn <1>
Typical Abbreviation: Mt. Vernon
Time Zone: Mount Vernon lies in the Central Time Zone (CST/CDT)
Telephone Area Codes: 618 & 730<2>
ZIP Code: 62864<3>
Elevation: 530 feet [161.54 m] above sea level<4>
From the 2010 US Census (For more detail, see our Census Page for Mount Vernon)
Population
| Year | Population |
| 2019 Est:<5> | 14,663 (4.02% decrease since 2010) |
| 2010: | 15,277 (6.1% decrease since 2000) |
| 2000: | 16,269 |
Total Area:<6> 13.15 sq. miles [34.1 km²]
Housing Units:<7> 7,534
Official Website: www.mtvernon.com/
GPS Coordinates (Latitude/Longitude)<8>
For the purpose of mapping and calculating distances, we have chosen the following reference point for Mount Vernon:
Lat: 38.316900° (or 38°19'0" N)
Lon: -88.903600° (or -88°54'12" W)
USGS Topo Map: Mount Vernon<9>
Federal GNIS/FIPS Codes for Mount Vernon
GNIS ID: 2395129
FIPS State / Place Code: 17 / 51180
(For more about Federal Codes, see our Misc Page for Mount Vernon)
About Jefferson County
The city of Mount Vernon is the County Seat for Jefferson County.
From the 2010 US Census (For more detail, see our Census Page for Jefferson)
Population
| Year | Population |
| 2019 Est: | 37,684 (2.76% decrease since 2010) |
| 2010 | 38,755 (3.22% decrease since 2000) |
| 2000: | 40,045 |
Total Area: 583 sq. miles [1,512 km²] - of which 2.16% is water (12.62 sq. miles [32.7 km²])
Housing Units: 16,954
Federal GNIS/FIPS Codes for Jefferson
GNIS ID: 424242
FIPS State / County Code: 17 / 081
(For more about Federal Codes, see our Misc Page for Mount Vernon)
About Illinois
From the US Census
Population
| Year | Population |
| 2019 Est: | 12,667,017 (1.28% decrease since 2010) |
| 2010: | 12,830,632 (3.31% increase since 2000) |
| 2000: | 12,419,293 |
Websites for State of Illinois
Official Website: https://illinois.gov
Tourism: https://www.enjoyillinois.com/
Parks: https://www.dnr.illinois.gov/
Fishing: https://www.ifishillinois.org/
Hunting: https://dnr.illinois.gov/hunting.html
Federal GNIS/FIPS Codes for State of Illinois
GNIS ID: 1779784
FIPS State: 17
(For more about Federal Codes, see our Misc Page for Mount Vernon)
Off-the-Road Links ...
The official website for Mount Vernon: www.mtvernon.com/
The official website for State of Illinois: https://illinois.gov
Footnotes ...
| <1> | The pronunciation we've provided is our attempt to give a phonetic pronunciation for Mount Vernon. 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. |
| <2> | 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 Mount Vernon area will be assigned with one of these codes: 618 or 730. As a result, placing a call in the Mount Vernon area will require 10-digit dialing (where you enter both the area code and then the phone number). |
| <3> | 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 Mount Vernon). When looking for a ZIP Code, whether Mount Vernon or elsewhere, it's always best to check the website of the United States Postal Service (USPS). |
| <4> | The elevation is an estimate for the area around Mount Vernon - it will be higher in some places and lower in others. |
| <5> | Every year, the US Census Bureau creates a population estimate for the preceeding year. Keep in mind that this value is an estimate and not an actual count. The most recent Census estimate is for the year 2019. |
| <6> | The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Mount Vernon. The value given by the Census Bureau reflects their statistical (or sampling) requirements. For example, if there is a cluster of people living just outside of the community's official boundary, the Census-defined area might be expanded to include that group. |
| <7> | A Housing Unit is a broad term for those places where people live (whether occupied or temporarily vacant), such as a house, an apartment, a mobile home, or an area that is considered as a separate living quarter. Separate living quarters (consisting of one or more rooms) are considered to be those places where people live, sleep and eat separately from others and that have access to the outside (either directly or by a shared hallway). |
| <8> | Longitude & latitude values may not be the geographic center of Mount Vernon, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source. |
| <9> | Name of the USGS 7.5 Minute topographic map which includes Mount Vernon. |