Cottage Lake, WA Profile: Facts & Data

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Cottage Lake, Washington - Basic Facts

The Cottage Lake CDP(1) had a population of 22,843 as of July 1, 2023.

The primary coordinate point for Cottage Lake is located at latitude 47.7443 and longitude -122.0773 in King County. The formal boundaries for the Cottage Lake Census Designated Place encompass a land area of 22.66 sq. miles and a water area of 0.13 sq. miles. King County is in the Pacific time zone (GMT -8).

The Cottage Lake Census Designated Place has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

Washington is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The Cottage Lake Census Designated Place is located within Seattle East Division of King County.


  1. A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

Jump to... (On This Page!)
  1. Cottage Lake 2023 Demographic Data
  2. Growth Rates for Cottage Lake (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Washington Research Tools (Easy Tools & Current Data)
  3. Washington Data Comparison Tool - 2023 Demographics
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Cottage Lake, WA Data & Demographics (As of July 1, 2023)

POPULATION

Total Population 22,843 (100%)
Population in Households 22,784 (99.7%)
Population in Families 21,061 (92.2%)
Population in Group Quarters1 59 ( 0.3%)
Population Density 1,005
Diversity Index2 48
 
 

INCOME

Median Household Income $200,001
Average Household Income $267,407
% of Income for Mortgage4 29%
Per Capita Income $91,020
Wealth Index5 365
Socioeconomic Status Index6 High (66.3)
 

HOUSING

Total HU (Housing Units) 7,969 (100%)
Owner Occupied HU 7,112 (89.2%)
Renter Occupied HU 663 ( 8.3%)
Vacant Housing Units 194 ( 2.4%)
Median Home Value $970,819
Average Home Value $1,088,994
Housing Affordability Index3 82
 

HOUSEHOLDS

Total Households 7,775
Average Household Size 2.93
Family Households 6,700
Average Family Size 3.00
NOTES
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

GROWTH RATE / YEAR

2020-2023 2023-2028
Population -0.02% 0.18%
Households 0.04% 0.12%
Families   0.29%
Median Household Income   0.00%
Per Capita Income   2.45%
Owner Occupied HU   -0.18%

Cottage Lake, WA - Peer Comparisons by Rank and Percentile

The table below compares Cottage Lake to the other 639 incorporated cities, towns and CDPs in Washington by rank and percentile using July 1, 2023 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 63 90th
Population Density # 300 53rd
Median Household Income # 4 99th
Housing Affordability Index # 417 65th
Per Capita Income # 8 99th
Diversity Index # 291 54th

Additional comparisons and rankings can be made with a VERY EASY TO USE Washington Census Data Comparison Tool.

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