Knox County, IN demographics:
population, income, and more

Total population
36,007
-0.3% year-over-year change
Median household income
$61,237/yr
4.0% year-over-year change
Housing units
16,974
0.1% year-over-year change

Knox County population

How many people live in Knox County

Knox County is home to 36,007 residents, according to the most recent Census data. Gender-wise, 50.7% of Knox County locals are male, and 49.3% are female.

Total population
36,007
-0.3% year-over-year change
Gender ratio
Male
50.7%
18,251
Female
49.3%
17,756
Value Percent YoY change
Male 18,251 50.7% -0.5%
Female 17,756 49.3% -0.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Knox County is 39, with the population distributed as follows: about 17.8% are children under 15, then 15% are in the 15 to 24 age group. Adults between 25 and 44 make up 24.1% of the population, while another 24% fall into the 45 to 64 bracket. Finally, around 19.1% are 65 or older.

Median age
39
Age breakdown
Under 15
17.8%
15 to 24
15%
25 to 44
24.1%
45 to 64
24%
Over 65
19.1%
Value Percent YoY change
Under 15 6,408 17.8% -0.0%
15 to 24 5,399 15% -1.1%
25 to 44 8,669 24.1% 1.6%
45 to 64 8,654 24% -4.5%
Over 65 6,877 19.1% 3.4%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Knox County, 97.5% of the population are US-born citizens, while 1.3% have gained naturalized citizenship. At the same time, 1.2% of residents are non-citizens. As for race, 89.7% of locals are Caucasian, 1.7% are African American and 0.9% have Asian roots. There’s also a share of 6.6% that includes residents with two or more races.

Citizenship
U.S.-born citizens
97.5%
Non-U.S.-born citizens
1.3%
Non-citizens
1.2%
Value Percent YoY change
U.S.-born citizens 35,116 97.5% -0.2%
Non-U.S.-born citizens 461 1.3% 41.9%
Non-citizens 430 1.2% -27.2%
Racial breakdown
White
89.7%
Black or African American
1.7%
American Indian and Alaska Native
0.1%
Asian
0.9%
Native Hawaiian and other Pacific Islander
0%
Two or more races
6.6%
Other
1%
Value Percent
White 32,307 89.7%
Black or African American 604 1.7%
American Indian and Alaska Native 20 0.1%
Asian 310 0.9%
Native Hawaiian and other Pacific Islander 4 0%
Two or more races 2,386 6.6%
Other 376 1%

Households in Knox County

A peek inside Knox County households

Knox County has 15,169 households, with an average of 2 members in each. Of these, 60.4% are families, while the remaining 39.6% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
15,169
0.4% year-over-year change
Average people per household
2
Non-family households
5,999
Family households
9,170
Value Percent YoY change
Non-family households 5,999 39.6% 1.6%
Family households 9,170 60.4% -0.4%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Knox County

The housing landscape of Knox County

Knox County's housing consists of 16,974 units, with 74.8% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 0.9% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 4.5% of the housing landscape.

Housing units
16,974
0.1% year-over-year change
Housing types
Value Percent
1 unit, detached 12,693 74.8%
1 unit, attached 152 0.9%
2 units 1,209 7.1%
3 or 4 units 814 4.8%
5 to 9 units 415 2.4%
10 to 19 units 98 0.6%
20 to 49 units 434 2.6%
50 or more units 400 2.4%
Mobile home 759 4.5%
Homes built since 2020
200
37.9% year-over-year change

The age of buildings in Knox County

In Knox County, the median construction year is 1962. About 30.8% of homes were built before the 1940s, with another 5.3% going up by 1949. Most development happened in the second half of the 20th century. Then, 6.3% of homes were added from 2000 to 2009, 3.6% between 2010 and 2019, and 1.2% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 5,223 30.8% 7.5%
Built between 1940 and 1949 903 5.3% -19.4%
Built between 1950 and 1959 1,974 11.6% 0.4%
Built between 1960 and 1969 1,706 10% -10.2%
Built between 1970 and 1979 2,084 12.3% -4.8%
Built between 1980 and 1989 1,525 9% -12.4%
Built between 1990 and 1999 1,680 9.9% -4.5%
Built between 2000 and 2009 1,076 6.3% 41.8%
Built between 2010 and 2019 603 3.6% 14.6%
Built in 2020 or later 200 1.2% 37.9%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Knox County occupancy rates

Out of the 15,169 occupied housing units in Knox County, 67.8% are owner-occupied, while 32.2% are lived in by tenants. Meanwhile, 10.6% of all homes on the local market sit vacant.

Occupied housing units
15,169
0.4% year-over-year change
Occupancy breakdown
Renter occupied
4,884
Owner occupied
10,285
Value Percent YoY
change
Renter occupied 4,884 32.2% -5.3%
Owner occupied 10,285 67.8% 3.3%
Unoccupied housing units
10.6%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Knox County housing costs

Housing costs in Knox County come to a median of $781 per month, while tenants specifically pay a median gross rent of $796.

Median housing costs per month
$781/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Knox County
$796/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Knox County

Knox County education at a glance

About 43.5% of the population in Knox County went to high school, while 21.8% pursued college studies. Another 14.7% earned an associate degree and 11.1% hold a bachelor’s. Meanwhile, 6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 818 2.9% 6.9%
High school diploma 12,266 43.5% 0.8%
College diploma 6,140 21.8% -8.0%
Associate degree 4,161 14.7% -1.3%
Bachelor's degree 3,136 11.1% 8.0%
Graduate degree 1,699 6% 8.7%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Knox County

How much people earn in Knox County

The average annual household income in Knox County was $81,626 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +1.6% change from the previous year. At the same time, the median income stood at $61,237, reflecting a +4% shift over the same period.

Average household income in Knox County
$81,626/year
1.6% year-over-year change
Median household income in Knox County
$61,237/year
4.0% year-over-year change

Knox County income by age

In Knox County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $70,507. Those with someone between 45 and 64 in charge, often well established professionally, earn $70,732 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $39,821, while those led by someone over 65, many of whom may be retired, have about $48,538 in earnings. Overall, 86.3% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $39,821 -4.6%
25 - 44 $70,507 4.5%
45 - 64 $70,732 0.5%
Over 65 $48,538 -3.2%
Above poverty level
29,333
Below poverty level
4,652
Value Percent YoY
change
Above poverty level 29,333 86.3% -0.2%
Below poverty level 4,652 13.7% 2.6%

Employment in Knox County

Workforce and job types in Knox County

The job market in Knox County is powered by 17,177 working residents, spread across a range of industries and roles. 70.2% of the working population are employed in professional or administrative positions, while 29.8% are in hands-on or service-based jobs. Also, 7.4% run their own businesses, 65.9% are employed by private companies, and 11.7% work in the public sector.

Workforce demographics

Working population
17,177
-3.8% year-over-year change
White collar
12,067
Blue collar
5,110
Value Percent YoY change
White collar 12,067 70.2% -2.2%
Blue collar 5,110 29.8% -7.4%
Employer type
Self employees
7.4%
Private companies
65.9%
Governmental workers
11.7%
Not for profit companies
14.9%
Value Percent YoY change
Self employees 1,273 7.4% -2.2%
Private companies 11,327 65.9% -3.7%
Governmental workers 2,010 11.7% -8.0%
Not for profit companies 2,567 14.9% -1.4%
Unemployment rate
3.1%
20.5% year-over-year change

Available workforce

The unemployment rate in Knox County stands at 3.1%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Knox County

How people get around in Knox County

In Knox County, the average commute time is 20 minutes. Commuting methods vary: 93% of residents travel by personal vehicle and 3.8% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
20 min
-2.0% year-over-year change
Means of transportation
Value Percent YoY change
Car 15,720 93% -4.2%
Bus or trolleybus 58 0.3% -3.3%
Motorcycle 10 0.1% -66.7%
Bicycle 52 0.3% -14.8%
Walk 649 3.8% 0.3%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Knox County by zipcode?

Zipcode Population Number of households Median income Average income
47512 4,243 1,824 $57,857 $65,667
47516 988 439 $76,250 $103,646
47524 302 140 $0 $75,100
47528 457 200 $57,692 $58,398
47535 807 307 $70,236 $75,329
47557 1,345 513 $84,375 $85,375
47561 1,442 673 $45,911 $64,725
47578 566 290 $56,641 $68,988
47591 25,168 10,487 $61,803 $85,885
47596 94 59 $93,958 $75,298

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FAQs about Knox County demographics 

What is the total population of Knox County?

Knox County has a total population of 36,007 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -0.3% compared to a year ago.

What is the gender ratio in Knox County?

The gender ratio in Knox County is as follows:
  • 50.7% males (18,251 residents)
  • 49.3% females (17,756 residents)

What is the median age in Knox County?

The median age in Knox County is 39.

What is the age distribution of the population in Knox County?

The age distribution in Knox County is as follows:
  • Under 15: 17.8% (6,408 residents)
  • Ages 15-24: 15% (5,399 residents)
  • Ages 25-44: 24.1% (8,669 residents)
  • Ages 45-64: 24% (8,654 residents)
  • Over 65: 19.1% (6,877 residents)

What is the racial and ethnic makeup of Knox County?

The racial and ethnic makeup of Knox County is as follows:
  • White: 89.7% (32,307 residents)
  • Black or African American: 1.7% (604 residents)
  • American Indian and Alaska Native: 0.1% (20 residents)
  • Asian: 0.9% (310 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (4 residents)
  • Two or More Races: 6.6% (2,386 residents)
  • Other: 1% (376 residents)

What percentage of the population in Knox County are U.S.-born citizens?

U.S.-born citizens represent 97.5% of the population in Knox County.

How many housing units are there in Knox County?

There are 16,974 housing units in Knox County, reflecting a +0.1% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Knox County and what is the average household size?

Knox County has a total of 15,169 households, with an average of 2 people in each.

What is the median household income in Knox County?

Knox County has a median household income of $61,237, representing a +4.0% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Knox County?

The employment rate is 96.9% in Knox County, with a workforce of 17,177 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 70.2% (12,067 residents)
  • Blue-collar workers: 29.8% (5,110 residents)

Places of employment:
  • Self-employed: 7.4% (1,273 residents)
  • Private companies: 65.9% (11,327 residents)
  • Governmental workers: 11.7% (2,010 residents)
  • Not-for-profit companies: 14.9% (2,567 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025