Learn About
The Commemorative
Quarter for
Washington

Summary for Kelso

About Kelso (Click for our profile page)

Located in: Cowlitz County (see below)

Time Zone: Kelso lies in the Pacific Time Zone (PST/PDT)

Telephone Area Codes: 360 & 564<1>

ZIP Code: 98626<2>

Elevation: Near sea level<3>

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

Population

Year	Population
2019 Est:<4>	12,393 (3.92% increase since 2010)
2010:	11,925 (0.25% increase since 2000)
2000:	11,895

Total Area:<5> 8.5 sq. miles [22 km²] - of which 4.18% is water (0.35 sq. miles [0.9 km²])

Housing Units:<6> 5,139

Official Website: www.kelso.gov/

GPS Coordinates (Latitude/Longitude)<7>

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

Lat: 46.144500° (or 46°8'40" N)

Lon: -122.908400° (or -122°54'30" W)

USGS Topo Map: Rainier<8>

Federal GNIS/FIPS Codes for Kelso

GNIS ID: 2410174

FIPS State / Place Code: 53 / 35065

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

About Cowlitz County

The city of Kelso is the County Seat for {Cowlitz County}.

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

Population

Year	Population
2019 Est:	110,593 (8.05% increase since 2010)
2010	102,358 (10.12% increase since 2000)
2000:	92,948

Total Area: 1,166 sq. miles [3,020.5 km²] - of which 2.24% is water (26.09 sq. miles [67.6 km²])

Housing Units: 43,450

Official Website: https://www.co.cowlitz.wa.us/

Federal GNIS/FIPS Codes for Cowlitz

GNIS ID: 1529156

FIPS State / County Code: 53 / 015

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

About Washington

From the US Census

Population

Year	Population
2019 Est:	7,614,024 (13.23% increase since 2010)
2010:	6,724,540 (14.09% increase since 2000)
2000:	5,894,121

Websites for State of Washington

Official Website: https://wa.gov/

Tourism: https://stateofwatourism.com/

Parks: https://parks.wa.gov/

Fishing: https://wdfw.wa.gov/fishing/

Hunting: https://wdfw.wa.gov/hunting/

Federal GNIS/FIPS Codes for State of Washington

GNIS ID: 1779804

FIPS State: 53

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

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 360 code has been Overlayed with the 564 area code. New phone numbers in the Kelso area will be assigned with one of these codes: 360 or 564. As a result, placing a call in the Kelso 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 Kelso). When looking for a ZIP Code, whether Kelso 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 Kelso - 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 Kelso. 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 Kelso, 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 Kelso.