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Summary for Hannibal

About Hannibal (Click for our profile page)

Located in: Primarily Marion County (see below). A portion of Hannibal extends into Ralls County.

Time Zone: Hannibal lies in the Central Time Zone (CST/CDT)

Telephone Area Codes: 573 & 235<1>

ZIP Code: 63401<2>

Elevation: 620 feet [188.98 m] above sea level<3>

From the 2010 US Census (For more detail, see our Census Page for Hannibal)

Population

Year	Population
2019 Est:<4>	17,350 (3.16% decrease since 2010)
2010:	17,916 (0.9% increase since 2000)
2000:	17,757

Total Area:<5> 16.2 sq. miles [42 km²] - of which 2.89% is water (0.47 sq. miles [1.2 km²])

Housing Units:<6> 8,021

Websites for Hannibal

Official Website: www.hannibal.us/

Chamber of Commerce: www.hannibalchamber.org/

GPS Coordinates (Latitude/Longitude)<7>

For the purpose of mapping and calculating distances, we have chosen the following reference point for Hannibal:

Lat: 39.714600° (or 39°42'52" N)

Lon: -91.391700° (or -91°23'30" W)

USGS Topo Map: Hannibal West<8>

Federal GNIS/FIPS Codes for Hannibal

GNIS ID: 2394287

FIPS State / Place Code: 29 / 30214

(For more about Federal Codes, see our Misc Page for Hannibal)

About Marion County

The city of Palmyra is the County Seat for {Marion County}.

From the 2010 US Census (For more detail, see our Census Page for Marion)

Population

Year	Population
2019 Est:	28,530 (0.89% decrease since 2010)
2010	28,787 (1.76% increase since 2000)
2000:	28,289

Total Area: 444.3 sq. miles [1,150.7 km²] - of which 1.66% is water (7.38 sq. miles [19.1 km²])

Housing Units: 12,826

Official Website: https://marioncountymo.com/

Federal GNIS/FIPS Codes for Marion

GNIS ID: 758517

FIPS State / County Code: 29 / 127

(For more about Federal Codes, see our Misc Page for Hannibal)

About Missouri

From the US Census

Population

Year	Population
2019 Est:	6,140,475 (2.53% increase since 2010)
2010:	5,988,927 (7.04% increase since 2000)
2000:	5,595,211

Websites for State of Missouri

Official Website: https://www.mo.gov/

Tourism: https://www.visitmo.com/

Parks: https://mostateparks.com/

Fishing: https://mdc.mo.gov/fishing

Hunting: https://mdc.mo.gov/hunting-trapping

Federal GNIS/FIPS Codes for State of Missouri

GNIS ID: 1779791

FIPS State: 29

(For more about Federal Codes, see our Misc Page for Hannibal)

Footnotes ...

<1>	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 573 code has been Overlayed with the 235 area code. New phone numbers in the Hannibal area will be assigned with one of these codes: 573 or 235. As a result, placing a call in the Hannibal area will require 10-digit dialing (where you enter both the area code and then the phone number).
<2>	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 Hannibal). When looking for a ZIP Code, whether Hannibal or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<3>	The elevation is an estimate for the area around Hannibal - it will be higher in some places and lower in others.
<4>	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.
<5>	The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Hannibal. 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.
<6>	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).
<7>	Longitude & latitude values may not be the geographic center of Hannibal, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source.
<8>	Name of the USGS 7.5 Minute topographic map which includes Hannibal.