Seneca County Population Charts

According to the most recent Seneca County Ohio demographics data available from the 2022 Census Bureau released in the American Community Survey in November of 2022, Figure 1 Seneca County depicts it has a Population 2021 of 55,166 which is in the mid range of other counties in the local area. The county with the highest population in the area is Hancock County which depicts a population of 75,139 (36.2% larger). Figure 3 uses the Seneca County population data for a comparison of the population growth/population change estimates from the years 2010 to 2021 and Seneca County Ohio depicts a decline of 1,579 (3%).

The total Seneca County Ohio greater area population percent change for all areas for the years from 2010 to 2021 is shown in Figure 4 and for Seneca County depicts it has a Population Change of -2.8% which is in the mid point range of other counties in the area.

Looking at the Seneca County population density (measured as people per square mile) and providing comparisons to both the national and state average population density in Figure 5, Seneca County Ohio depicts it has 100 people per square mile which is the second smallest as measured by population density of all the other counties in the metropolitan area. The next higher as measured by population density is Crawford County only about 4.3% larger with population density of 104. The county with the highest population density in the area is Ottawa County which depicts a people per square mile of 159 (58.6% larger). Figure 6 provides Seneca County demographics for the overall median age for all people in the region and Seneca County shows it has a Median Age of 40.5 which is less than most other counties in the metropolitan area. The county with the highest overall median age of all people in the area is Ottawa County which indicates an age of 49.6 (22.5% larger). The Seneca County Ohio population data for median age broken out by gender for both men versus the median age of women is shown in Figure 7. Seneca County Ohio depicts a median age of men about 6.1% smaller as the median age of women.

The next demographic analysis (Figure 8) looks at large generational Seneca 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 Seneca County Ohio has one of the largest proportions of people less than 20 years of age at 12.5% of the total and is ranked #2. The only larger county being Hancock County with 13.3%. Second, it has less than most other counties in the greater region in terms of people between 60 and 69 years old at 11.9% of the total.

Figure 9 illustrates the overall diversity breakdown for Seneca 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.) Seneca County Ohio has the largest proportion of White population at 3.2% of the total and is ranked #1. Figure 10 shows the Seneca County Ohio Hispanic (including non Hispanic whites) population household ethnicity in the region and Seneca County shows it has a Hispanic or Latino of 5.4% which is in the center range of other counties in the metro area. 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.

Seneca 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. Seneca County has the largest proportion of total percent married at 33% of the total and is ranked #1. Second, it has the smallest proportion of percent divorced at 6% of the total. Figure 14 compares the average household size using the average number of people in a family for Seneca County households. Seneca County depicts it has a Family Size of 3.0 which is in the center range of other counties in the local area. The county with the highest average family size in the area is Huron County which shows an average family size of 3.2 (only about 5.9% larger).

Figure 15 shows the overall ratio of Seneca County households for families to the total number of Seneca County households and that Seneca County depicts it has a Families of 64% which is less than most other counties in the local area. The county with the highest percent of people who are in a family in the area is Wyandot County which shows a families percent of 68% (only about 5.0% larger).

Looking at Seneca County households that are headed by a husband and wife as a percent of all families in Figure 16, Seneca County shows it has a Married-couple family of 74% which is less than most other counties in the local area. The county with the highest percent of people in a husband and wife family in the area is Ottawa County which shows a husband and wife family percent of 78% (only about 5.7% larger).

Seneca 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. Seneca County shows it has a Birth Rate of 5.2% which is the second most percent of women who have given birth of all the counties in the greater Seneca County region. The county with the highest percent of women who gave birth in the area is Wyandot County which depicts a birth rate of 6.2% (20.8% larger). Figure 19 shows the breakdown of the mother's age for all baby births that occurred in the last 12 months and it has one of the largest proportions of percent of births to mothers aged 15 to 19 at 29% of the total and is ranked #2. The only larger county being Ottawa County with 38%.

In Figure 20, the demographic data for Seneca County Ohio teenager birth rate is shown (women between the ages of 15 and 19.) Seneca County shows it has a Teenager Birth Rate of 3% which is in the middle range of other counties in the local area. The county with the highest teenager birth rate in the area is Wyandot County which depicts a births to a teenager of 15% (approximately 4.4 times bigger).

In Figure 21, the percentage of all births in the last 12 months to mothers that were unmarried is shown (unwed mothers.) Seneca County depicts it has a Unwed Births of 39% which is in the center range of other counties in the local area. The county with the highest percent of unwed women who have given birth in the area is Sandusky County which shows an unwed mother birth rate of 59% (51.9% larger).

The next chart, Figure 22, shows the percentage of unwed mothers who are also on public assistance. Seneca County shows it has a Unwed birth and on public assistance of 3.7% which is the third most of all other counties in the metropolitan area. The county with the highest percent of unwed women who have given birth and are on public assistance in the area is Crawford County which depicts a percent of unwed women who gave birth and are on public assistance of 22.4% ( quite a bit bigger).

Unwed mothers who have given birth in the last 12 months are also shown broken down by age group in Figure 24. Seneca County Ohio has one of the largest proportions of unwed mothers aged 15 to 19 at 90.9% of the total and is ranked #3. Only #2 Hancock County (99.0%), and #1 Ottawa County (100.0%) are larger. Second, it has one of the largest proportions of unwed mothers aged 20 to 34 at 2.5% of the total and is ranked #3. Only #2 Sandusky County (9.5%), and #1 Huron County (30.2%) are larger. 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.) Seneca County Ohio has one of the largest proportions of White unwed birth rate at 43.8% of the total and is ranked #2. The only larger county being Sandusky County with 100.0%. Second, it has one of the largest proportions of Black unwed birth rate at 62.5% of the total and is ranked #3. Only #2 Sandusky County (86.5%), and #1 Huron County (100.0%) are larger.

Figure 26 shows unwed mothers in poverty (based on median household income definition) who have given birth in the last 12 months. Seneca County Ohio has one of the largest proportions of unwed births and living below poverty level at 44.8% of the total and is ranked #2. The only larger county being Sandusky County with 45.4%.

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 it has one of the largest proportions of percent of unwed mothers with less than high school education at 53% of the total and is ranked #2. The only larger county being Sandusky County with 58%. Second, it has the second smallest in order of percent of unwed mothers with less than high school education of all the other counties in the local area when ranked by percent of unwed mothers who are a high school graduate or equivalent at 17% of the total. Third, it has the largest proportion of percent of unwed mothers with some college or an associates degree at 18% of the total and is ranked #1.

Seneca County Marital Status Charts

The next set of demographic data looks at the marital status for Seneca County households which is useful for internet research. Figure 28 compares the total number of single people in each area. Seneca County depicts it has a Total Single People of 51% which is the highest of all counties in the greater Seneca County region. Comparing percent of people who are single for any reason to the United States average of 50%, Seneca County is only slightly larger. Also, in comparison with the state of Ohio, percent of people who are single for any reason of 51%, Seneca County is about the same size.

Figure 30 compares the single people in each area broken down by never married, divorced, and widowed. Seneca County Ohio has the percentage of percent never married the second smallest in terms of percent of people never married of all the other counties in the area at 12% of the total. Second, it has the smallest proportion of percent divorced at 6% 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. Seneca County Ohio has the smallest proportion of men who have never been married at 10% of the total. Figure 32 shows the number of single women adults in each area broken out by never married, divorced and widowed. Seneca County Ohio has the smallest proportion of women who are divorced at 9% of the total.

Figure 33 shows the Seneca 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 Seneca County metro area. Seneca County Ohio has the smallest proportion of single men 18 to 24 at 13% of the total. Second, it has the largest proportion of single men 25 to 29 at 11% of the total and is ranked #1. Third, it has the second smallest in order of percent of single men 18 to 24 of all the other counties in the metro area when ranked by single men 30 to 34 at 8% of the total. Also, it has the smallest proportion of single men 50 to 60 at 6% of the total.

Seneca County Citizenship Demographics Charts

In Figure 37, the demographic percentage of Seneca County residents who were not born in the United States is shown (i.e. percent foreign born.) Seneca County shows it has a Percent Foreign Born of 1.6% which is the third most percent born outside United States of all other counties in the greater Seneca County region. The county with the highest percent of population who was born in another country in the area is Hancock County which depicts a percent born outside United States of 3.4% (about twice as large). Comparing percent of population who was born in another country to the United States average of 13.6%, Seneca County is approximately an eigth the size. Also, in contrast to the state of Ohio, percent of population who was born in another country of 4.8%, Seneca County is approximately a third the size.

Figure 39 provides a detailed analysis of non citizens by breaking them into two age groups: Under 18 and over the age of 18. Seneca County Ohio depicts a percent of non citizens under 18 years old approximately an eigth 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 32.3 which is the second smallest when ranked by median age of non citizens of all the other counties in the surrounding region. The county with the highest median age of non citizens in the area is Sandusky County which depicts a median age of 42.2 (30.7% 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. it has one of the largest proportions of non citizens who entered the US after 2010 at 72% of the total and is ranked #3. Only #2 Sandusky County (78%), and #1 Crawford County (81%) are larger. Second, it has less than most other counties in the area as measured by non citizens who entered the US between 2000 to 2009 at 8% of the total. Third, it has the second smallest in terms of percent of non citizens who entered the US after 2010 of all the other counties in the metropolitan area in terms of non citizens who entered the US between 1990 to 1999 at 9% of the total. Also, it has one of the largest proportions of non citizens who entered the US before 1990 at 11% of the total and is ranked #3. Only #2 Ottawa County (16%), and #1 Huron County (17%) are larger.

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. has the percentage of people naturalized 2015 or later the second smallest when sorted by percent of people naturalized 2015 or later of all the other counties in the metro area at 4% of the total. Second, it has the second smallest in terms of percent of people naturalized 2015 or later of all the other counties in the area in order of people naturalized 2010 to 2014 at 8% of the total. Third, it has one of the largest proportions of people naturalized 2005 to 2009 at 22% of the total and is ranked #2. The only larger county being Huron County with 25%. Also, it has the largest proportion of people naturalized 2000 to 2004 at 15% of the total and is ranked #1. In addition, it has in the center range of other counties in the greater region as measured by people naturalized 1995 to 1999 at 8% of the total. Furthermore, it has one of the largest proportions of people naturalized before 1990 at 40% of the total and is ranked #3. Only #2 Crawford County (47%), and #1 Ottawa County (62%) are larger.

Seneca County Birthplace Demographic Charts

Figure 43 displays a map of the globe and shows Seneca County demographic information for large regions of the world that people from this place originally came from. Seneca County Ohio has the largest proportion of from Europe at 40% of the total and is ranked #1. Second, it has the largest proportion of from Africa at 5% of the total and is ranked #1. Third, it has the smallest proportion of from the Americas at 23% of the total.

Figure 44 categorizes the location for where foreign born people originally come from based on very large continental geographic areas. Seneca County Ohio has the largest proportion of from Asia at 5% of the total and is ranked #1. Second, it has the smallest proportion of from Oceania at 23% of the total.

Figure 45 is a table that breaks out all the people who were foreign born by which large geographic region where they were born. Seneca County Ohio has the largest proportion of people who were born in Northern Europe at 13.9% of the total and is ranked #1. Second, it has the largest proportion of people who were born in Southern Europe at 13.6% of the total and is ranked #1. Third, it has the largest proportion of people who were born in Eastern Europe at 5.4% of the total and is ranked #1. Also, it has the largest proportion of people who were born in South Central Asia at 9.8% of the total and is ranked #1. In addition, it has the largest proportion of people who were born in Eastern Africa at 4.2% of the total and is ranked #1.