Lake Cassidy, WA Profile: Facts & Data


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Lake Cassidy, Washington - Basic Facts

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The Lake Cassidy CDP(1) had a population of 3,868 as of July 1, 2021.

The primary coordinate point for Lake Cassidy is located at latitude 48.0639 and longitude -122.092 in Snohomish County. The formal boundaries for the Lake Cassidy Census Designated Place encompass a land area of 10.57 sq. miles and a water area of 0.21 sq. miles.

The Lake Cassidy Census Designated Place has a U2 Census Class Code which indicates a census designated place without 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 Lake Cassidy Census Designated Place is located within Marysville Division of Snohomish 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.

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  1. Lake Cassidy 2021 Demographic Data
  2. Growth Rates for Lake Cassidy (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 - 2021 Demographics

Lake Cassidy, WA Data & Demographics (As of July 1, 2021)


Total Population 3,868 (100%)
Population in Households 3,868 (100.0%)
Population in Families 3,302 (85.4%)
Population in Group Quarters1 0
Population Density 365
Diversity Index2 37


Median Household Income $99,184
Average Household Income $116,845
% of Income for Mortgage4 22%
Per Capita Income $40,980
Wealth Index5 139


Total HU (Housing Units) 1,445 (100%)
Owner Occupied HU 1,196 (82.8%)
Renter Occupied HU 200 (13.8%)
Vacant Housing Units 49 ( 3.4%)
Median Home Value $511,916
Average Home Value $549,520
Housing Affordability Index3 118


Total Households 1,396
Average Household Size 2.77
Family Households 1,068
Average Family Size 3
  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.


2010-2021 2021-2026
Population 1.1% 1.51%
Households 1.1% 1.54%
Families 1.25% 1.51%
Median Household Income   1.82%
Per Capita Income   2.77%
Owner Occupied HU   1.74%

Lake Cassidy, WA - Peer Comparisons by Rank and Percentile

The table below compares Lake Cassidy to the other 625 incorporated cities, towns and CDPs in Washington by rank and percentile using July 1, 2021 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 # 229 64th
Population Density # 466 26th
Median Household Income # 114 82nd
Housing Affordability Index # 320 51st
Per Capita Income # 174 72nd
Diversity Index # 308 51st

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

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