Washington County Population Charts

According to the most recent Washington County Oregon demographics data available from the 2022 Census Bureau released in the American Community Survey in November of 2022, Figure 1 Washington County shows it has a Population 2021 of 596,969 which is the second most populous of all the counties in the greater Washington County region. The county with the highest population in the area is Multnomah County which shows a population of 810,011 (35.7% larger). Figure 3 uses the Washington County population data for a comparison of the population growth/population change estimates from the years 2010 to 2021 and Washington County Oregon shows an increase of 67,259 (13%).

The total Washington County Oregon greater area population percent change for all areas for the years from 2010 to 2021 is shown in Figure 4 and for Washington County shows it has a Population Change of 12.7% which is the second most of all the counties in the surrounding region.

Looking at the Washington County population density (measured as people per square mile) and providing comparisons to both the national and state average population density in Figure 5, Washington County Oregon depicts it has 824 people per square mile which is the second most people per square mile of all the counties in the greater Washington County region. The next lower population density is Clark County only about 4.4% smaller with population density of 789. The county with the highest population density in the area is Multnomah County which depicts a people per square mile of 1,879 (approximately 2.3 times bigger). Figure 6 provides Washington County demographics for the overall median age for all people in the region and Washington County indicates it has a Median Age of 37.3 which is the smallest as measured by overall median age of all people of all the other counties in the metropolitan area. The county with the highest overall median age of all people in the area is Tillamook County which depicts an age of 47.7 (27.9% larger).

The next demographic analysis (Figure 7) looks at large generational Washington County population groups (and can be useful internet research for employment related research or identifying areas with retirees). Key findings in this chart includes that Washington County Oregon has the smallest proportion of people between 50 and 59 yeasr old at 10.5% of the total.

Figure 8 illustrates the overall diversity breakdown for Washington County population and ethnicity groups in the area. (note: Hispanic/Latino is broken out separately in the next diagram and also the group denoted as Native ethnicity includes Native American, and Hawaiian and Other Pacific Islander.) Washington County Oregon has the largest proportion of Black population at 10.8% of the total and is ranked #1. Second, it has the largest proportion of Native population at 14.2% of the total and is ranked #1. Figure 9 shows the Washington County Oregon Hispanic (including non Hispanic whites) population household ethnicity in the region and Washington County depicts it has a Hispanic or Latino of 17.1% which is ranked #1 of all counties in the greater region.

Washington County Families and Marital Status Charts

Figure 10 shows the detailed marriage characteristics broken down by %residents who are married, never married, single, divorced, and widowed. Washington County has the smallest proportion of never married percent at 11% of the total. Figure 11 compares the average household size using the average number of people in a family for Washington County households. Washington County shows it has a Family Size of 3.2 which is the third most average family size of all other counties in the greater Washington County region. The county with the highest average family size in the area is Clark County which shows an average family size of 3.3 ( only slightly larger).

Looking at Washington County households that are headed by a husband and wife as a percent of all families in Figure 12, Washington County depicts it has a Married-couple family of 79% which is more than all other counties in the greater Washington County region.

The next section of charts provide a detailed look at mothers and baby births that occurred over the past 12 months. Figure 13 shows the rate of women aged 15 to 50 years old who have given birth. Washington County shows it has a Birth Rate of 4.4% which is less than most other counties in the area. The county with the highest percent of women who gave birth in the area is Tillamook County which depicts a birth rate of 8.6% (about twice as large). Figure 14 shows the breakdown of the mother's age for all baby births that occurred in the last 12 months and it has the largest proportion of percent of births to mothers aged 25 to 29 at 34% of the total and is ranked #1.

The next set of demographic data looks at the marital status for Washington County households which is useful for internet research. Figure 16 compares the total number of single people in each area. Washington County shows it has a Total Single People of 46% which is less than most other counties in the local area. The county with the highest percent of people who are single for any reason in the area is Multnomah County which depicts a percent single of 56% (21.7% larger). Comparing percent of people who are single for any reason to the United States average of 50%, Washington County is about 8.6% smaller. Also, in comparison with the state of Oregon, percent of people who are single for any reason of 49%, Washington County is about 7.1% smaller.

Washington County Citizenship Demographics Charts

The next section of demographic information provides detailed data Washington County residents including: immigrants, citizenship, immigration, country of origin, non citizens and more. To start, Figure 17 shows a high level view of citizenship. Washington County Oregon has the largest proportion of citizens born In US at 9% of the total and is ranked #1. Second, it has the largest proportion of citizens by naturalization at 9% of the total and is ranked #1. The next diagram (Figure 18) shows the year of entry that non citizens entered the United States. The year of entry can show the rate of flow at various points of time in the past for when they entered the U.S. it has the largest proportion of non citizens who entered the US after 2010 at 48% of the total and is ranked #1. Second, it has the second smallest as measured by percent of non citizens who entered the US after 2010 of all the other counties in the greater region in order of non citizens who entered the US between 2000 to 2009 at 27% of the total. Third, it has the smallest proportion of non citizens who entered the US between 1990 to 1999 at 17% of the total. Also, it has the smallest proportion of non citizens who entered the US before 1990 at 9% of the total.

Washington County Birthplace Demographic Charts

Figure 19 looks at the detailed country of origin demographic research for foreign-born people in this place. Click column to sort.

For comparison purposes, Figure 20 shows detailed statistic data for the entire United States. In particular, this diagram breaks down the detailed country of origin foreign-born people in the entire U.S. in order to compare with the data provided in the prior diagram which shows only for the local area. Both this diagram and the prior diagram are sorted the same way to facilitate comparison between the two. Click column to sort.