Editing Tri-Cities, Washington (section)

==Demographics==
Historical combined population of Kennewick, Pasco, and Richland.
{{US Census population
|1910= 3652
|1920= 5325
|1930= 5223
|1940= 6078
|1950= 42143
|1960= 52314
|1970= 55422
|1980= 86403
|1990= 94807
|2000= 125467
|2010= 181756
|2020= 220959
}}
The three adjoining cities if combined into one city would be the 100th largest by population and 73rd largest by area in the United States.

===Kennewick===
As of April 1, 2024, the population of Kennewick was estimated at 87,120 <ref name="ReferenceA">{{cite web
|url=https://ofm.wa.gov/sites/default/files/public/dataresearch/pop/april1/ofm_april1_population_final.pdf|title = April 1, 2022 Population of Cities, Towns and Counties|website=ofm.wa.gov}}</ref> according to the Washington State Office of Financial Management, Forecasting Division.

As of the 2023 census, there were 85,155 people, 30,295 households, and 2.8 persons per household. The population density was {{convert|2,987.5|/mi2|/km2|disp=preunit|people&nbsp;|people}}. There were 32,495 housing units at an average density of {{convert|961.2|/mi2|/km2}}. The racial makeup of the city was 55% White, 2% Black or African American, 1% Native American, 2% Asian, <1% Pacific Islander, 2% from other races, and 3% from two or more races. 36% of the population was Hispanic or Latino of any race.

There were 30,295 households, out of which 37.6% had children under the age of 18 living with them, 51.5% were married couples living together, 12.2% had a female householder, and 31.8% were non-families. 26.1% of all households were made up of individuals, and 8.6% had someone living alone who was 65 years of age or older. The average household size was 2.6 and the average family size was 3.15.

In the city the population was spread out, with 29.6% under the age of 18, 10.3% from 18 to 24, 29.3% from 25 to 44, 20.6% from 45 to 64, and 10.2% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 98.3 males. For every 100 females age 18 and over, there were 94.3 males.

The median income for a household in the city was $41,213, and the median income for a family was $50,011. Males had a median income of $41,589 versus $26,022 for females. The per capita income for the city was $20,152. About 9.7% of families and 12.9% of the population were below the poverty line, including 18.8% of those under age 18 and 8.7% of those age 65 or over.

===Pasco===

As of April 1, 2021, the population of Pasco was estimated at 78,700,<ref name="ReferenceA"/> according to the Washington State Office of Financial Management, Forecasting Division.

As of the [[2020 United States census|2020 census]], there were 77,108 people, and according to the 2000 census results, 9,619 households, and 7,262 families residing in the city. The population density was {{convert|1,141.9|/mi2|/km2|disp=preunit|people&nbsp;|people}}. There were 10,341 housing units at an average density of {{convert|368.2|/mi2|/km2}}. The racial makeup of the city was 52.76% White, 3.22% African American, 0.77% Native American, 1.77% Asian, 0.14% Pacific Islander, 37.44% from other races, and 3.9% from two or more races. Hispanic or Latino of any race was 56.26% of the population.

There were 9,619 households, out of which 45.6% had children under the age of 18 living with them, 54.7% were married couples living together, 14.3% had a female householder, and 24.5% were non-families. 20.1% of all households were made up of individuals, and 8.5% had someone living alone who was 65 years of age or older. The average household size was 3.30 and the average family size was 3.79.

In the city the population was spread out, with 35.5% under the age of 18, 11.8% from 18 to 24, 28.5% from 25 to 44, 15.5% from 45 to 64, and 8.7% who were 65 years of age or older. The median age was 27 years. For every 100 females, there were 106.7 males. For every 100 females age 18 and over, there were 104.2 males.

The median income for a household in the city was $34,540, and the median income for a family was $37,342. Males had a median income of $29,016 versus $22,186 for females. The per capita income for the city was $13,404. About 19.5% of families and 23.3% of the population were below the poverty line, including 31.4% of those under age 18 and 9.6% of those age 65 or over.

===Richland===

As of April 1, 2021, the population of Richland was estimated at 61,320,<ref name="ReferenceA"/> according to the Washington State Office of Financial Management, Forecasting Division.

As of the [[2020 United States census|2020 census]], there were 60,560 people, and according to the 2000 census, 15,549 households, and 10,682 families residing in the city. The population density was {{convert|1,111.8|/mi2|/km2|disp=preunit|people&nbsp;|people}}. There were 16,458 housing units at an average density of {{convert|472.7|/mi2|/km2}}. The racial makeup of the city was 89.55% White, 1.37% African American, 0.76% Native American, 4.06% Asian, 0.11% Pacific Islander, 1.85% from other races, and 2.31% from two or more races. Hispanic or Latino of any race was 4.72% of the population.

There were 15,549 households, out of which 34.1% had children under the age of 18 living with them, 56% were married couples living together, 9.3% had a female householder, and 31.3% were non-families. 27.2% of all households were made up of individuals, and 9.4% had someone living alone who was 65 years of age or older. The average household size was 2.48 and the average family size was 3.02.

In the city the population was spread out, with 27.2% under the age of 18, 7.5% from 18 to 24, 27.1% from 25 to 44, 25.4% from 45 to 64, and 12.8% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 96 males. For every 100 females age 18 and over, there were 93.2 males.

The median income for a household in the city was $53,092, and the median income for a family was $61,482. Males had a median income of $52,648 versus $30,472 for females. The per capita income for the city was $25,494. About 5.7% of families and 8.2% of the population were below the poverty line, including 10.8% of those under age 18 and 5.6% of those age 65 or over.

Based on per capita income, one of the more reliable measures of affluence, Richland ranks 83rd of 522 areas ranked in the state of Washington—the highest rank achieved in Benton County.