King County GIS Center
King Street Center
201 S. Jackson St.
Suite 706
Seattle, WA 98104

+ 47.59909 N
- 122.33136 W

+ 47°  35' 56.72"
- 122° 19' 52.90"


2020 Consolidated Demographics Index

Description | Contacts | Attribute Information | Constraints

Data layer thumbnail image


Subject category: census
Title: 2020 Consolidated Demographics Index
Feature Count: 397
Feature Type: Polygon
Abstract: This layer was originally created to support the STAR Rating System objective EE-4: Equitable Services & Access Community Level Outcomes for King County. Three demographics are combined into one attribute to determine King County services access analysis by census tract. Each demographic: English proficiency, people of color, and household income, was applied to census tracts separately. This demographic information is based on the 2016 - 2020 American Community Survey from the Census Bureau. The demographic was sorted into five classes using the Natural Breaks classification. Then each class was given a score: 1 for the first class, 2 for the second class, 3 for the third class, etc. Next, each census tract received a score based on the class it was in: 1 if it was in the first class, 2 if it was in the second class, 3 if it was in the third class, etc. So each census tract will have a score for English proficiency (ESL_Score), a score for people of color (RE_Score), and a score for household income (Income_Score). These scores were added up (TotalScore) and an evenly weight average was determined (WeightedTotal333333). Thus each score for the census tracts represents a combination of demographics where lower scores mean a wealthier, less diverse community and higher scores mean more diverse, less wealthy community.
Purpose: Combines three demographic characteristics into one category. English proficiency, people of color, and household income are scored and combined into a equal weighted score.
Status: Complete
Updated: None planned
Time period of content: (single date,as YYYYMMDD)::
Time period of content: (date range, as YYYYMMDD):: 20130101 - 20171231
Spatial reference: WA State Plane North
FGDC Documentation: Classic or FAQ
Open Data Availability: Yes
Place Keywords: Pacific NW, King County, WA, Washington state,
Theme Keywords: census, demographics, persons of color, median income, english, ESL, American Community Survey,
Lineage: Not available


Maintained by:
King County GIS Center
Primary: Mary Ullrich, GIS Specialist, 206-477-4420
(How to e-mail a County contact)
Secondary: KCGIS Center; This mailbox is monitored during business hours.

Attribute Information

_GEO_ID_TRT_Unique identifier for each census tract.Numeric string
Range Min:10153.0
Range Max:45838.0
_TRACT_LBL_Alpha numeric code for each tract."Tract" followed by tract identifier
_LOGRECNO_A unique ID for each tract.Integer
_ESL_Score_English Proficiency Score for tract.
_Income_Score_Household Income Score for tract
_RE_Score_People of Color Score for tract
_TotalScore_Total demographic score for tract.Sum of values from items ESL_Score, Income_Score and RE_Score
_WeightedTotal333333_Evenly weighted total of score.Total Score divided by three
_Population_Total population of tract.
Range Min:1287.0
Range Max:11041.0
_NumberofESL_Number of people speaking English as a second langugage. Count as integer
_PercentESL_Percent of people speaking English as a second langugage.Percent as floating point
_MedianHouseholdIncome_Median household income for census tract.Income in dollars
_NumberofPOC_Number of people who identify as a person of color or have Latino/Hispanic ethnicity.Count as integer
_PercentPOC_Percent of people who identify as a person of color or have Latino/Hispanic ethnicity.Percent as floating point


Access: None

Use: King County data are made available with the understanding that they shall be used exclusively by the obtainer or his/her authorized agents. Digital products may not be reproduced or redistributed in any form or by any means without the express written authorization of King County.