A Gazetteer for the United States and Canada
Census Data for Ketchikan ...
The most recent Census Estimate<1> was for 2018 and it gave Ketchikan a population of 8,289 people.
The last Decennial Census<2> was in 2010, which gave Ketchikan a population of 8,050 people.
When the Census Bureau conducts a census for a city like Ketchikan, they draw a boundary around the area in which they are going to conduct their count - this defines the sampling area (usually shaped as a polygon). The shape of the sampling area can be quite complex and it's important to keep in mind that the boundaries of the sampling area may or may not match the recognized boundaries of the city.
Things like the population, area and housing for Ketchikan reflect the sampling area. Since the shape of the sampling area and the actual boundaries of Ketchikan might be different, it's best to check with the U.S. Census Bureau to resolve any difference between the two.
The 2010 Census shows that the sampling area for Ketchikan has a total area of 5.9 square miles [15.3 km²]. Of this total, 4.35 square miles [11.3 km²] is land, with the balance (26.2%) being water (1.54 square miles [4 km²]).
Not only does the sampling area define boundaries, it also has a GPS location (latitude & longitude) that indicates a point within the sampling area (usually the center of the polygon, known as the centroid). At the time of the 2010 Census, the sampling area was located at:
Lat: 55° 21' 27" (or 55.4°) [Map]
More information on this topic and the changes between the 2000 Census and the 2010 Census can be found in the section for our Census-to-Census Observations ... (see below).
Population Density ...
Using the population (8,050 people) and land area (4.35 square miles [11.3 km²]) values from the 2010 Census, Ketchikan had a population density of 1,364 people per square mile [526 people/km²].
In comparison, the 2000 Census shows Ketchikan had a population of 7,922 people and a land area of 3.37 square miles [8.7 km²]. This gives a population density of 1,912 people per square mile [738 people/km²]
NOTE: Be aware that when comparing population density between the 2000 Census and the 2010 Census, there were changes in the sampling area for Ketchikan. You need to be careful when making such a comparison, the differences are likely to lead to a questionable comparison. More information about the nature of these changes can be found in the section Census-to-Census Observations ... (see below).
Housing Units ...
At the time of the 2010 Census, Ketchikan had 3,731 Housing Units<3> and with its population of 8,050 people, this averages 2.16 people per Housing Unit.
The 2010 Census shows Ketchikan had a land area of 4.35 square miles [11.3 km²]. This translates to 632 Housing Units per square mile [244.2 housing units/km²].
From the Census of 2000: Ketchikan had 3,645 Housing Units, a population of 7,922 people and a land area of 3.37 square miles [8.7 km²]. This gives a density of 2.17 people per Housing Unit and 880 Housing Units per square mile [339.8 housing units/km²].
NOTE: Repeating the caution above (under Population Density), be aware that when comparing Housing Units between the 2000 and the 2010 Census, there were changes in the sampling area for Ketchikan and you need to be careful when comparing numbers between the censuses. More information about the changes can be found in the section called Census-to-Census Observations ... (see below).
Population Rings for Ketchikan ...
To help identify the number of people who live in Ketchikan and the surrounding area, we have drawn concentric rings centered on Ketchikan. We counted the number of communities within each ring and summed their populations.<4>
Census-to-Census Observations ...
When the Census Bureau takes a census count (or enumeration) for Ketchikan, they start by specifying the boundaries of the area to be counted. This area (or sampling area) is a polygon and its shape can be quite complex - it may or may not match the geographical boundaries of Ketchikan. It's important to note that from one Census to the next, the shape and location of the polygon can change. If you need precision or details about the methodology of the Census, you should visit the U.S. Census Bureau for a definitive answer.
The sampling area (or polygon) given for the 2010 Census is 42.4% larger than the 2000 Census.
The 2010 Census shows that the total area for Ketchikan was 5.9 square miles [15.3 km²]. Of this total, 4.35 square miles [11.3 km²] is land, with the balance (26.2%) being water (1.54 square miles [4 km²]).
The 2000 Census shows a total area of 4.14 square miles [10.7 km²]. Of this total, 3.37 square miles [8.7 km²] is land, with the balance (13.03%) being water (0.77 square miles [2 km²]).
While generally coinciding with the GPS location (latitude/longitude) of Ketchikan, the latitude and longitude given by the Census Bureau actually indicates the GPS location of the polygon for Ketchikan.
For the 2010 Census, the location was given as:
Lat: 55.357695° (or 55°21'27" N) [Map]
For the 2000 Census, the location given was:
Lat: 55.347669° (or 55°20'51" N) [Map]
The difference indicates that the U.S. Census Bureau moved the location of the polygon for the 2010 Census 4,249 feet to the northwest<5> of the location that was used in the 2000 Census.
The U.S. Geological Survey (USGS) and the U.S. Board on Geographic Names (BGN) have assigned a unique GNIS identifier (#2419408) to Ketchikan. This identifier also marks a GSP point on the map, and that point lies within the boundaries of Ketchikan. The GNIS point has been mapped to the latitude/longitude:
Lat: 55.348842° (or 55°20'55" N) [Map]
The GSP location given for the 2010 Census lies 5,539 feet to the northwest<6> of the point given by the GNIS for Ketchikan. For more information about this and the relationship of the various Federal Codes, please visit our Misc Page for Ketchikan.
Miscellaneous Information for Ketchikan ...
The Federal government has assigned various identifying codes to each community, county and state. At one time or another, the US Census Bureau has used one (or more) of the following identifiers when referring to either or the city of Ketchikan:
The GNIS Codes ...
The current system of identification is called the Geographic Names Information System (GNIS). The following GNIS codes relate to Ketchikan:
GNIS ID for Ketchikan: 2419408
The FIPS Codes ...
An earlier (and largely obsolete) identification method was called the Federal Information Processing Standard (FIPS):
State Code: 02 (Alaska)
Place Code: 38970 (Ketchikan)
Misc. Census Codes ...
Ketchikan is located in Census Region #4 (the West Region) and Division #9 (the Pacific Division).
US Postal Service ZIP Codes ...
While some people have used ZIP codes to identify a community, the ZIP codes were actually created to make mail delivery more efficient by grouping addresses together. Although a ZIP Code doesn't specifically identify a city like Ketchikan, they do identify addresses that are in (or near) the city. It's important to remember that the boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes.
Our list of ZIP codes for Ketchikan : & .<7>
Census ZCTA Codes ...
The US Census Bureau created statistical entities that they call ZIP Code Tabulation Areas (ZCTAs) and these ZCTAs are frequently confused with the ZIP codes that come from the US Postal Service (USPS).
ZCTAs were first created for the 2000 Census and at that time, they were based upon the USPS ZIP codes. While largely covering the same areas, the boundaries of a ZCTA do not necessarily match the boundaries of a postal ZIP code with the same number. For example, while a postal ZIP code can cross a county or state line, a Census ZCTA can not. They should be treated as separate entities with no correlation between them.
For more information about the various Federal identification codes, please visit our Misc Page for Ketchikan.
Other Roadside Stops ...
Off-the-Road Links ...
The official website of the U.S. Census Bureau
The official website for Ketchikan: www.city.ketchikan.ak.us/
The official website for State of Alaska: alaska.gov/
The official website of the U.S. Board on Geographic Names (BGN)
The official website of the U.S. Geological Survey (USGS)
Please keep in mind that we can not guarantee the accuracy or timeliness of the information on this website, so use with care. We encourage you to double-check the information that is critical to you.
If you've found an error or have additional information that you would like to share, please don't hesitate to write. Click here to contact us.
This page was last modified: 08 Jan 2020