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Summary for Onawa

About Onawa (Click for our profile page)

Located in: Monona County (see below)

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

Telephone Area Code: 712

ZIP Code: 51040<1>

Elevation: 1,040 feet [316.99 m] above sea level<2>

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

Population

Year	Population
2019 Est:<3>	2,772 (7.54% decrease since 2010)
2010:	2,998 (3.01% decrease since 2000)
2000:	3,091

Total Area:<4> 5.19 sq. miles [13.4 km²]

Housing Units:<5> 1,519

GPS Coordinates (Latitude/Longitude)<6>

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

Lat: 42.026700° (or 42°1'36" N)

Lon: -96.097300° (or -96°5'50" W)

USGS Topo Map: Onawa<7>

Federal GNIS/FIPS Codes for Onawa

GNIS ID: 468464

FIPS State / Place Code: 19 / 59115

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

About Monona County

The city of Onawa is the County Seat for {Monona County}.

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

Population

Year	Population
2019 Est:	8,615 (6.84% decrease since 2010)
2010	9,248 (7.7% decrease since 2000)
2000:	10,020

Total Area: 698 sq. miles [1,810.2 km²]

Housing Units: 4,697

Official Website: https://mononacountyiowa.gov/

Federal GNIS/FIPS Codes for Monona

GNIS ID: 465255

FIPS State / County Code: 19 / 133

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

About Iowa

From the US Census

Population

Year	Population
2019 Est:	3,159,596 (3.72% increase since 2010)
2010:	3,046,355 (4.1% increase since 2000)
2000:	2,926,324

Websites for State of Iowa

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

Tourism: https://www.traveliowa.com/

Parks: https://www.iowadnr.gov/

Fishing: https://www.iowadnr.gov/things-do/fishing

Hunting: https://www.iowadnr.gov/things-do/hunting-trapping

Federal GNIS/FIPS Codes for State of Iowa

GNIS ID: 1779785

FIPS State: 19

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

Footnotes ...

<1>	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 Onawa). When looking for a ZIP Code, whether Onawa or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
<2>	The elevation is an estimate for the area around Onawa - it will be higher in some places and lower in others.
<3>	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.
<4>	The area value has been supplied by the US Census Bureau and it can be different than the geographic boundaries of Onawa. 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.
<5>	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).
<6>	Longitude & latitude values may not be the geographic center of Onawa, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source.
<7>	Name of the USGS 7.5 Minute topographic map which includes Onawa.