According to the most recent Marion County Oregon demographics data available from the 2022 Census Bureau released in the American Community Survey in November of 2022, Figure 1 Marion County shows it has a Population 2021 of 344,037 which is the third most populous of all other counties in the greater Marion County region. The county with the highest population in the area is Multnomah County which shows a population of 810,011 (approximately 2.4 times bigger). Figure 3 uses the Marion County population data for a comparison of the population growth/population change estimates from the years 2010 to 2021 and Marion County Oregon depicts an increase of 28,702 (9%).
The total Marion County Oregon greater area population percent change for all areas for the years from 2010 to 2021 is shown in Figure 4 and for Marion County depicts it has a Population Change of 9.1% which is less than most other counties in the greater region.
Looking at the Marion County population density (measured as people per square mile) and providing comparisons to both the national and state average population density in Figure 5, Marion County Oregon shows it has 291 people per square mile which is the second most of all the counties in the greater region. The next lower population density is Clackamas County approximately three-fourths the size with population density of 224. The county with the highest population density in the area is Multnomah County which shows a people per square mile of 1,879 ( considerably bigger). Figure 6 provides Marion County demographics for the overall median age for all people in the region and Marion County depicts it has a Median Age of 37.0 which is the second smallest when ranked 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 Clackamas County which shows an age of 41.6 (12.4% larger).
Figure 8 illustrates the overall diversity breakdown for Marion 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.) Marion County Oregon has the largest proportion of Native population at 19.6% of the total and is ranked #1. Figure 9 shows the Marion County Oregon Hispanic (including non Hispanic whites) population household ethnicity in the region and Marion County depicts it has a Hispanic or Latino of 27.5% which is the highest of all counties in the greater Marion County region.
Marion County Families and Marital Status Charts
Figure 11 compares the average household size using the average number of people in a family for Marion County households. Marion County shows it has a Family Size of 3.4 which is at the top of all other counties in the greater Marion County region.
Looking at Marion County households that are headed by a husband and wife as a percent of all families in Figure 12, Marion County depicts it has a Married-couple family of 72% which is the smallest when sorted by percent of people in a husband and wife family of all the other counties in the metropolitan area. The county with the highest percent of people in a husband and wife family in the area is Clackamas County which shows a husband and wife family percent of 81% (11.4% larger).
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. Marion County depicts it has a Birth Rate of 5.0% which is in the center range of other counties in the local area. The county with the highest percent of women who gave birth in the area is Yamhill County which shows a birth rate of 6.2% (23.6% larger). 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 20 to 24 at 40% of the total and is ranked #1. Second, it has the smallest proportion of percent of births to mothers aged 30 to 34 at 15% of the total.
The next set of demographic data looks at the marital status for Marion County households which is useful for internet research. Figure 16 compares the total number of single people in each area. Marion County depicts it has a Total Single People of 50% which is the third most of all other counties in the metro 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% (11.7% larger). Comparing percent of people who are single for any reason to the United States average of 50%, Marion County is about the same size. Also, versus the state of Oregon, percent of people who are single for any reason of 49%, Marion County is only slightly larger.
Marion County Citizenship Demographics Charts
The next section of demographic information provides detailed data Marion County residents including: immigrants, citizenship, immigration, country of origin, non citizens and more. To start, Figure 17 shows a high level view of citizenship. Marion County Oregon has the largest proportion of citizens by naturalization at 8% 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. has the smallest proportion of non citizens who entered the US after 2010 at 21% of the total. Second, it has one of the largest proportions of non citizens who entered the US between 2000 to 2009 at 35% of the total and is ranked #2. The only larger county being Linn County with 43%. Third, it has the largest proportion of non citizens who entered the US between 1990 to 1999 at 31% of the total and is ranked #1.
Marion 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.
Cities marked with an asterisk ("*") should resemble a city or town but do not have their own government (i.e. Mayor, City Council, etc.) These places should be recognizable by the local community but their boundaries have no legal status. Technically these include both Census Designated Places (CDP) and Census County Divisions (CCD) which are defined by the Census Bureau along with local authorities. (For more information, see:
Census Designated Place or "CDP")
and Census County Division "CCD".)
For comparison purposes, the US national average and the state average value are provided. Additionally, the "Combined Statistical Area" or CSA is shown that is closest to the city, county, or zip code shown. A CSA is a large grouping of adjacent metropolitan areas that identified by the Census Bureau based on social and economic ties. (See: Combined Statistical Area)
Data sources - Mouse over icon in upper right corner of each chart for information.