Mountlake Terrace, WA Profile: Facts, Map & Data


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Mountlake Terrace, Washington - Basic Facts

The City of Mountlake Terrace had a population of 20,877 as of July 1, 2016. Mountlake Terrace ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Washington. See peer rankings below.

The primary coordinate point for Mountlake Terrace is located at latitude 47.7943 and longitude -122.3026 in Snohomish County. The formal boundaries for the City of Mountlake Terrace (see map below) encompass a land area of 4.06 sq. miles and a water area of 0.11 sq. miles. Snohomish County is in the Pacific time zone (GMT -8). The elevation is 459 feet.

The City of Mountlake Terrace (GNIS ID: 2411187) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Washington is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The City of Mountlake Terrace is located within Edmonds Division of Snohomish County.

Beneath the boundary map are tables with Mountlake Terrace population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


City of Mountlake Terrace, WA Boundary Map

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Boundary Maps: Edmonds Division | Snohomish County | Washington Counties

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Mountlake Terrace, WA Data & Demographics (As of July 1, 2016)


Total Population 20,877
Population in Households 20,755
Population in Familes 15,505
Population in Group Qrtrs 122
Population Density1 5,146
Diversity Index2 62


Total Households 8,567
Average Household Size 2.42
Family Households 5,093
Average Family Size 3


Total Housing Units 9,048 (100%)
Owner Occupied HU 5,121 (56.6%)
Renter Occupied HU 3,446 (38.1%)
Vacant Housing Units 481 ( 5.3%)
Median Home Value $285,642
Average Home Value $306,800


Median Household Income $57,567
Average Household Income $68,443
Per Capita Income $28,172
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.76% 1.13%
Households 0.72% 1.12%
Families 0.65% 1.04%
Median Household Income   1.64%
Per Capita Income   1.66%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

Mountlake Terrace, WA - Peer Comparisons by Rank and Percentile

The table below compares Mountlake Terrace to the other 627 incorporated cities, towns and CDPs in Washington by rank and percentile using July 1, 2016 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 # 60 91st
Population Density1 # 9 99th
Diversity Index2 # 98 85th
Median Household Income # 262 58th
Per Capita Income # 279 56th

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