Demographics
Historical population| Census | Pop. | Note | %± |
|---|
| 1890 | 696 | | — |
|---|
| 1900 | 486 | | −30.2% |
|---|
| 1910 | 5,153 | | 960.3% |
|---|
| 1920 | 5,877 | | 14.1% |
|---|
| 1930 | 6,137 | | 4.4% |
|---|
| 1940 | 6,307 | | 2.8% |
|---|
| 1950 | 13,563 | | 115.0% |
|---|
| 1960 | 23,342 | | 72.1% |
|---|
| 1970 | 25,816 | | 10.6% |
|---|
| 1980 | 35,025 | | 35.7% |
|---|
| 1990 | 37,473 | | 7.0% |
|---|
| 2000 | 49,347 | | 31.7% |
|---|
| 2010 | 78,163 | | 58.4% |
|---|
| 2020 | 96,749 | | 23.8% |
|---|
| 2024 (est.) | 101,238 | [9] | 4.6% |
|---|
|
2024–2025 estimates
As of the second quarter of 2025, the median home value in Franklin County was $416,327. [14]
As of the 2024 American Community Survey, there are 31,564 estimated households in Franklin County with an average of 3.09 persons per household. The county has a median household income of $81,604. Approximately 17.8% of the county's population lives at or below the poverty line. Franklin County has an estimated 58.1% employment rate, with 21.3% of the population holding a bachelor's degree or higher and 80.0% holding a high school diploma. [2] There were 32,687 housing units at an average density of 26.33 per square mile (10.2/km2). [2]
The median age in the county was 32.5 years. [2]
2020 census
Franklin County, Washington – racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.| Race / ethnicity (NH = non-Hispanic) | Pop. 1980 [15] | Pop. 1990 [16] | Pop. 2000 [17] | Pop. 2010 [18] | Pop. 2020 [19] |
|---|
| White alone (NH) | 27,502
(78.52%) | 23,784
(63.47%) | 23,470
(47.56%) | 33,804
(43.25%) | 37,225
(38.48%) |
| Black or African American alone (NH) | 1,441
(4.11%) | 1,251
(3.34%) | 1,120
(2.27%) | 1,339
(1.71%) | 1,603
(1.66%) |
| Native American or Alaska Native alone (NH) | 234
(0.67%) | 217
(0.58%) | 235
(0.48%) | 357
(0.46%) | 437
(0.45%) |
| Asian alone (NH) | 330
(0.94%) | 805
(2.15%) | 767
(1.55%) | 1,384
(1.77%) | 1,796
(1.86%) |
| Pacific Islander alone (NH) | — | — | 32
(0.06%) | 92
(0.12%) | 195
(0.20%) |
| Other race alone (NH) | 106
(0.30%) | 100
(0.27%) | 39
(0.08%) | 96
(0.12%) | 338
(0.35%) |
| Mixed race or multiracial (NH) | — | — | 652
(1.32%) | 1,087
(1.39%) | 2,710
(2.80%) |
| Hispanic or Latino (any race) | 5,412
(15.45%) | 11,316
(30.20%) | 23,032
(46.67%) | 40,004
(51.18%) | 52,445
(54.21%) |
| Total | 35,025
(100.00%) | 37,473
(100.00%) | 49,347
(100.00%) | 78,163
(100.00%) | 96,749
(100.00%) |
As of the 2020 census, the county had a population of 96,749. [20] Of the residents, 31.5% were under the age of 18 and 9.9% were 65 years of age or older; the median age was 30.9 years. For every 100 females there were 106.9 males, and for every 100 females age 18 and over there were 109.0 males. 88.6% of residents lived in urban areas and 11.4% lived in rural areas. [21]
The population density was 77.92 inhabitants per square mile (30.1/km2) and there were 29,740 housing units at an average density of 23.95 per square mile (9.2/km2). Of those units, 3.3% were vacant; among occupied housing units, 68.3% were owner-occupied and 31.7% were renter-occupied. The homeowner vacancy rate was 0.5% and the rental vacancy rate was 3.6%. [22]
The racial makeup of the county was 47.4% White, 1.9% Black or African American, 1.5% American Indian and Alaska Native, 2.0% Asian, 30.4% from some other race, and 16.7% from two or more races. Hispanic or Latino residents of any race comprised 54.2% of the population. [20]
There were 28,748 households in the county, of which 47.5% had children under the age of 18 living with them and 20.7% had a female householder with no spouse or partner present. About 16.5% of all households were made up of individuals and 6.4% had someone living alone who was 65 years of age or older. [22]
2010 census
As of the 2010 census, there were 78,163 people, 23,245 households, and 18,163 families residing in the county. The population density was 62.95 inhabitants per square mile (24.3/km2). There were 24,423 housing units at an average density of 19.67 per square mile (7.6/km2). The racial makeup of the county was 60.48% White, 1.88% African American, 0.68% Native American, 1.83% Asian, 0.14% Pacific Islander, 31.83% from some other races and 3.16% from two or more races. Hispanic or Latino people of any race were 51.18% of the population.
In terms of ancestry, 13.1% were German, 6.8% were English, 6.5% were Irish, and 3.3% were American.
There were 23,245 households, 49.9% had children under the age of 18 living with them, 57.9% were married couples living together, 13.4% had a female householder with no husband present, 21.9% were non-families, and 16.4% of all households were made up of individuals. The average household size was 3.28 and the average family size was 3.68. The median age was 28.4 years.
The median income for a household in the county was $47,749 and the median income for a family was $52,218. Males had a median income of $40,604 versus $29,517 for females. The per capita income for the county was $18,660. About 16.5% of families and 19.9% of the population were below the poverty line, including 25.6% of those under age 18 and 13.7% of those age 65 or over.
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