Sioux County Population Charts

According to the most recent Sioux County Iowa demographics data available from the 2022 Census Bureau released in the American Community Survey in November of 2022, Figure 1 Sioux County indicates it has a Population 2021 of 35,647 which is the second most populous of all the counties in the greater Sioux County region. The county with the highest population in the area is Lincoln County which depicts a population of 63,233 (77.4% larger). Figure 3 uses the Sioux County population data for a comparison of the population growth/population change estimates from the years 2010 to 2021 and Sioux County Iowa shows an increase of 1,943 (6%).

The total Sioux County Iowa greater area population percent change for all areas for the years from 2010 to 2021 is shown in Figure 4 and for Sioux County depicts it has a Population Change of 5.8% which is the third most of all other counties in the area.

Looking at the Sioux County population density (measured as people per square mile) and providing comparisons to both the national and state average population density in Figure 5, Sioux County Iowa depicts it has 46 people per square mile which is the second most people per square mile of all the counties in the greater Sioux County region. The next lower population density is Union County approximately three-fourths the size with population density of 36. The county with the highest population density in the area is Lincoln County which shows a people per square mile of 110 (approximately 2.4 times bigger). Figure 6 provides Sioux County demographics for the overall median age for all people in the region and Sioux County shows it has a Median Age of 33.8 which is the smallest as measured by overall median age of all people of all the other counties in the greater region. The county with the highest overall median age of all people in the area is Osceola County which shows an age of 43.8 (29.6% larger). The Sioux County Iowa population data for median age broken out by gender for both men versus the median age of women is shown in Figure 7. Sioux County Iowa shows a median age of men about 6.4% smaller as the median age of women.

The next demographic analysis (Figure 8) looks at large generational Sioux 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 Sioux County Iowa has the largest proportion of people less than 20 years of age at 14.0% of the total and is ranked #1. Second, it has the second smallest in terms of people less than 20 years of age of all the other counties in the metro area when ranked by people between 60 and 69 years old at 11.0% of the total.

Figure 9 illustrates the overall diversity breakdown for Sioux 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.) Sioux County Iowa has the largest proportion of Native population at 7.1% of the total and is ranked #1. Figure 10 shows the Sioux County Iowa Hispanic (including non Hispanic whites) population household ethnicity in the region and Sioux County depicts it has a Hispanic or Latino of 11.2% which is the largest of all counties in the greater Sioux County region. Figure 11 compares the ratio of the amount of men to the amount of women and depicts total male population only slightly larger as the total female population.

Sioux County Marital Status and Families Charts

Figure 12 shows the detailed marriage characteristics broken down by %residents who are married, never married, single, divorced, and widowed. Sioux County has the largest proportion of total percent married at 29% of the total and is ranked #1. Second, it has the smallest proportion of never married percent at 5% of the total. Figure 14 compares the average household size using the average number of people in a family for Sioux County households. Sioux County depicts it has a Family Size of 3.3 which is the highest of all counties in the local area.

Figure 15 shows the overall ratio of Sioux County households for families to the total number of Sioux County households and that Sioux County shows it has a Families of 71% which is in the middle range of other counties in the greater region. The county with the highest percent of people who are in a family in the area is Lyon County which shows a families percent of 73% (only about 2.9% larger).

Looking at Sioux County households that are headed by a husband and wife as a percent of all families in Figure 16, Sioux County depicts it has a Married-couple family of 91% which is the largest of all counties in the greater region. Figure 17 shows Sioux County demographics for the head of household for each place using a breakdown of married-couple, male-headed alone, and female-headed alone. Sioux County Iowa has the smallest proportion of households at 3.6% of the total. Second, it has the smallest proportion of households at 4.9% of the total.

Sioux County Mothers and Children Charts

The next section of charts provide a detailed look at mothers and baby births that occurred over the past 12 months. Figure 18 shows the rate of women aged 15 to 50 years old who have given birth. Sioux County depicts it has a Birth Rate of 8.1% which is the third most percent of women who have given birth of all other counties in the greater Sioux County region. The county with the highest percent of women who gave birth in the area is OBrien County which shows a birth rate of 10.0% (24.1% larger). Figure 19 shows the breakdown of the mother's age for all baby births that occurred in the last 12 months and has the percentage of percent of births to mothers aged 15 to 19 the second smallest in order of percent of births to mothers aged 15 to 19 of all the other counties in the local area at 9% of the total. Second, it has the second smallest in order of percent of births to mothers aged 15 to 19 of all the other counties in the local area when ranked by percent of births to mothers aged 20 to 24 at 27% of the total. Third, it has the largest proportion of percent of births to mothers aged 25 to 29 at 41% of the total and is ranked #1.

In Figure 21, the percentage of all births in the last 12 months to mothers that were unmarried is shown (unwed mothers.) Sioux County shows it has a Unwed Births of 8% which is the smallest in terms of percent of unwed women who have given birth of all the other counties in the metro area. The county with the highest percent of unwed women who have given birth in the area is Union County which depicts an unwed mother birth rate of 33% (approximately 4.3 times bigger).

The next chart, Figure 22, shows the percentage of unwed mothers who are also on public assistance. Sioux County shows it has a Unwed birth and on public assistance of 12.5% which is the second most percent of unwed women who gave birth and are on public assistance of all the counties in the greater Sioux County region. The county with the highest percent of unwed women who have given birth and are on public assistance in the area is Union County which shows a percent of unwed women who gave birth and are on public assistance of 20.0% (60.0% larger).

Unwed mothers who have given birth in the last 12 months are also shown broken down by age group in Figure 24. Sioux County Iowa has the percentage of unwed mothers aged 15 to 19 less than most other counties in the surrounding region at 83.3% of the total. Second, it has the largest proportion of unwed mothers aged 20 to 34 at 16.7% of the total and is ranked #1. Figure 25 shows the comparative demographic rate of unwed mothers who have given birth in the last 12 months are broken down by racial group (including the Hispanic birth rate.) Sioux County Iowa has one of the largest proportions of Black unwed birth rate at 10.7% of the total and is ranked #2. The only larger county being Lincoln County with 100.0%.

Figure 26 shows unwed mothers in poverty (based on median household income definition) who have given birth in the last 12 months. Sioux County Iowa has the percentage of unwed births and living below poverty level less than most other counties in the local area at 12.8% of the total. Second, it has the largest proportion of unwed births and living between 100% and 199% of poverty level at 87.2% of the total and is ranked #1.

For all births to unwed mothers, Figure 27 breaks down the education level of the mother by less than high school through college and post graduate attainment has the smallest proportion of percent of unwed mothers with less than high school education at 4% of the total. Second, it has the largest proportion of percent of unwed mothers who are a high school graduate or equivalent at 83% of the total and is ranked #1.

Sioux County Marital Status Charts

The next set of demographic data looks at the marital status for Sioux County households which is useful for internet research. Figure 28 compares the total number of single people in each area. Sioux County shows it has a Total Single People of 39% which is the third most of all other counties in the surrounding region. The county with the highest percent of people who are single for any reason in the area is OBrien County which shows a percent single of 43% (8.1% larger). Comparing percent of people who are single for any reason to the United States average of 50%, Sioux County is approximately three-fourths the size. Also, compared with the state of Iowa, percent of people who are single for any reason of 48%, Sioux County is about 20.4% smaller.

Figure 30 compares the single people in each area broken down by never married, divorced, and widowed. Sioux County Iowa has the smallest proportion of percent never married at 5% of the total. Second, it has less than most other counties in the metropolitan area when sorted by percent divorced at 5% of the total. Figure 31 shows the demographics for the number of single men adults in each area broken out by never married, divorced and widowed. Sioux County Iowa has the smallest proportion of men who have never been married at 4% of the total. Figure 32 shows the number of single women adults in each area broken out by never married, divorced and widowed. Sioux County Iowa has the percentage of women who have never been married the second smallest in order of percent of women who have never been married of all the other counties in the metropolitan area at 6% of the total. Second, it has less than most other counties in the greater region in terms of women who are divorced at 8% of the total.

Figure 33 shows the Sioux County demographics for the ratio of the number of single men between the age of 18 and 65, in each area, broken down by age group for the Sioux County metro area. Sioux County Iowa has the percentage of single men 18 to 24 in the mid range of other counties in the local area at 14% of the total. Second, it has the smallest proportion of single men 25 to 29 at 5% of the total. Third, it has the smallest proportion of single men 30 to 34 at 5% of the total. Also, it has the smallest proportion of single men 40 to 44 at 3% of the total. In addition, it has the smallest proportion of single men 50 to 60 at 4% of the total.

Figure 34 shows the Sioux County population data for the ratio of the number of single women between the age of 18 and 65, in each area, broken down by age group for the Sioux County metro area. Sioux County Iowa has the percentage of single women 18 to 24 the second smallest in terms of percent of single women 18 to 24 of all the other counties in the local area at 8% of the total. Second, it has the smallest proportion of single women 25 to 29 at 3% of the total. Third, it has the smallest proportion of single women 30 to 34 at 3% of the total. Also, it has the smallest proportion of single women 35 to 39 at 4% of the total. In addition, it has the smallest proportion of single women 45 to 49 at 14% of the total. Furthermore, it has the smallest proportion of single women 50 to 60 at 4% of the total.

Sioux County Citizenship Demographics Charts

The next section of demographic information provides detailed data Sioux County residents including: immigrants, citizenship, immigration, country of origin, non citizens and more. To start, Figure 35 shows a high level view of citizenship. Sioux County Iowa has the largest proportion of citizens by naturalization at 4% of the total and is ranked #1. The next chart (Figure 36) shows for all citizens what the original place of birth was for people who were born in a foreign country and has the percentage of birthplace in northeast US less than most other counties in the area at 20% of the total.

In Figure 37, the demographic percentage of Sioux County residents who were not born in the United States is shown (i.e. percent foreign born.) Sioux County depicts it has a Percent Foreign Born of 5.8% which is the highest of all counties in the greater Sioux County region. Comparing percent of population who was born in another country to the United States average of 13.6%, Sioux County is approximately half the size. Also, compared to the state of Iowa, percent of population who was born in another country of 5.5%, Sioux County is 6.7% larger.

Figure 39 provides a detailed analysis of non citizens by breaking them into two age groups: Under 18 and over the age of 18. Sioux County Iowa depicts a percent of non citizens under 18 years old approximately a tenth the size as the percent of non citizens over 18 years old. Figure 40 provides further information for non citizen age by showing a comparison of the median age for all non citizens immigrants. it has a Non Citizen Median Age of 37.6 which is the second most median age of non citizens of all the counties in the greater Sioux County region. The county with the highest median age of non citizens in the area is Lyon County which depicts a median age of 40.6 (8.0% larger). The next diagram (Figure 41) 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 percentage of non citizens who entered the US after 2010 the second smallest in terms of percent of non citizens who entered the US after 2010 of all the other counties in the local area at 27% of the total. Second, it has one of the largest proportions of non citizens who entered the US between 2000 to 2009 at 51% of the total and is ranked #3. Only #2 Osceola County (56%), and #1 Lincoln County (66%) are larger. Third, it has the largest proportion of non citizens who entered the US between 1990 to 1999 at 19% of the total and is ranked #1. Also, it has less than most other counties in the greater region when ranked by non citizens who entered the US before 1990 at 2% of the total.

For all foreign born people who have gone through naturalization (the process of becoming a legal U.S. resident citizen), Figure 42 shows the year when they became fully naturalized U.S. citizens. it has one of the largest proportions of people naturalized 2015 or later at 28% of the total and is ranked #3. Only #2 Lincoln County (30%), and #1 OBrien County (33%) are larger. Second, it has less than most other counties in the greater region as measured by people naturalized 2010 to 2014 at 9% of the total. Third, it has one of the largest proportions of people naturalized 2005 to 2009 at 23% of the total and is ranked #2. The only larger county being Union County with 50%. Also, it has less than most other counties in the greater region in order of people naturalized 1995 to 1999 at 7% of the total. In addition, it has one of the largest proportions of people naturalized before 1990 at 16% of the total and is ranked #2. The only larger county being Osceola County with 60%.

Sioux County Birthplace Demographic Charts

Figure 43 displays a map of the globe and shows Sioux County demographic information for large regions of the world that people from this place originally came from. Sioux County Iowa has the smallest proportion of from Asia at 7% of the total. Second, it has in the mid range of other counties in the greater region in order of from Africa at 0% of the total. Third, it has one of the largest proportions of from Oceania at 0% of the total and is ranked #3. Only #2 Lyon County (4%), and #1 Plymouth County (5%) are larger. Also, it has one of the largest proportions of from the Americas at 84% of the total and is ranked #2. The only larger county being Osceola County with 86%.

Figure 44 categorizes the location for where foreign born people originally come from based on very large continental geographic areas. Sioux County Iowa has the smallest proportion of from Europe at 7% of the total. Second, it has in the mid range of other counties in the local area when sorted by from Asia at 0% of the total. Third, it has one of the largest proportions of from Oceania at 84% of the total and is ranked #2. The only larger county being Osceola County with 86%.

Figure 45 is a table that breaks out all the people who were foreign born by which large geographic region where they were born. Sioux County Iowa has the largest proportion of people who were born in Western Europe at 6.6% of the total and is ranked #1. Second, it has the smallest proportion of people who were born in Eastern Asia at 1.9% of the total. Third, it has one of the largest proportions of people who were born in Central America at 75.6% of the total and is ranked #2. The only larger county being Osceola County with 83.0%. Also, it has the largest proportion of people who were born in North America at 6.9% of the total and is ranked #1.