21791 Zip Code Population and Demographics

In this article, we'll explore the population statistics for the zip code 21791, including popular demographics data like median age, number of households, household income, gender, employment and unemployment rates, occupations, religion, and more.

21791 is a zip code in Carroll County and Frederick County, Maryland, which covers District 2, Uniontown, District 10, Middleburg, District 11, New Windsor, District 12, Union Bridge, District 8, Liberty, District 17, Johnsville, District 19, and Linganore, with a total population of 4,794 people.

We are using the latest American Community Survey (ACS) 5-Year survey data from the US Census Bureau, which is accurate up to 2021.

Table of Contents

Population

There is a lot of data that lets us see how many people live in the 21791 zip code. The most basic data is the total population, which is the total number of people living in 21791.

The estimated population of people living in 21791 is 4,794, with a median age of 43.7.

We can look back at data from previous years to see how the population in the 21791 area has changed over the last 5 years.

Year Population Change 5-Year Change
2021
4,794
 -5.63% -13.23%
2020
5,080
 -3.15% -
2019
5,245
 -1.56% -
2018
5,328
 -3.57% -
2017
5,525
 - -

Population of 21791 by Race and Ethnicity

How much has the race and ethnicity of the population in the 21791 zip code changed? The US Census Bureau gives us a few defined types that the population is broken down into.

Let's look at the total numbers and also the change over the last 5 years.

Race 2021 2017 Change
White
93.1%
93.4%
 -0.32%
Black/African American
1.6%
3.1%
 -48.39%
Native
0.1%
0%
 0.00%
Hispanic
1.3%
2.6%
 -50.00%
Asian
2.3%
0.5%
 +360.00%
Hawaiian/Pacific Islander
0.1%
0%
 0.00%
Two Or More Races
1.4%
0.4%
 +250.00%
Other
0%
0%
 0.00%

This data can be very important for anybody studying the 21791 zip for a number of reasons, including social and economic research, planning and development, and marketing to a multi-cultural population.

Note that the Native group includes both Native American and Alaskan Native people.

Population of 21791 by Age and Gender

We can also monitor the change of the age and gender in the 21791 zip code to track track trends in the population over time.

We can see how the population in 21791 has changed over the last 5 years by median age as a total, and also by male and female.

Year Total Male Female
2021 43.7 -6.42% 45.2 -2.59% 43.2 -9.62%
2020 46.7 +0.21% 46.4 -1.07% 47.8 +3.46%
2019 46.6 -3.52% 46.9 -1.68% 46.2 -4.94%
2018 48.3 +7.33% 47.7 +6.47% 48.6 +7.28%
2017 45 - 44.8 - 45.3 -

The median age of the 21791 zip gives you an idea of the age distribution, with half of the population being older than the median age and half being younger.

This can then be used to infer and compare against birth rates, parent ages, and more metrics to understand the population. For example, an increasing median age indicates an aging population in the 21791 area, which can be a sign of a declining population in terms of birth rates and workforce participation.

Age 2021 2017
(Years) Male Female Male Female
0 to 9 304 -12.72% 279 -3.89% 249 251
10 to 19 354 -19.22% 340 -36.33% 284 215
20 to 29 244 +26.96% 281 +5.24% 295 287
30 to 39 304 +25.32% 291 +21.52% 375 323
40 to 49 354 -41.12% 370 -61.7% 228 186
50 to 59 426 -19.56% 464 -18.4% 347 376
60 to 69 455 -17.69% 419 -32.73% 373 295
70+ 282 +36.34% 358 -9.36% 391 319

Median Household Income

The latest median household income for the 21791 zip code is $93,578.00.

In simple terms, the median income is the middle income of a group of people. Half of the people in the group make more than the median income, and half make less.

The median income is a good indicator of the overall income of a group of people, and can be used to compare against other metrics such as the average income, per capita income, and more.

Median Income by Age

We can also look at the median income by age to see how the median income varies by age, and how it compares to the overall median income for 21791.

  • Under 25
    $39,531.00
  • 25 to 44
    $111,336.00
  • 45 to 64
    $110,417.00
  • 65 and over
    $47,083.00

Average Household Income

Whenever we ask what is the average household income in the 21791 zip code, we are actually talking about the mean household income.

This is calculated by adding up all the incomes of all the households in 21791, and then dividing that number by the total number of households.

This is a good way to get a general idea of the average income of a group of people, but it can be skewed by a very high or very low incomes.

The average household income of 21791 is currently $108,535.00.

In terms of accurately summarizing income at a geographic level, the median income is a better metric than the average income because it isn't affected by a small number of very high or very low incomes.

If you had an area where the average income was greater than the median, it can mean that there is significant income inequality, with income being concentrated in a small number of wealthy households.

8.89% of households in 21791 are classed as high income households (making $200,000+ per year).

Household Income Tiers

The US Census Bureau divides households into income tiers based on the median income for the area. This is a good way to compare the income of 21791 against other zip codes.

  • Less than $24,999
    12.16%
  • $25,000 to $49,999
    12.99%
  • $50,000 to $74,999
    18.30%
  • $75,000 to $99,999
    11.07%
  • $100,000 to $149,999
    25.94%
  • $150,000 to $199,999
    10.65%
  • $200,000 or more
    8.89%

Per Capita Income

The per capita income in 21791 is $43,645.00.

Per capita income is the average income of a person in a given area. It is calculated by dividing the total income of 21791 by the total population of 21791.

This is different from the average or mean income because it includes and accounts for all people living in the 21791 area, including people like children, the elderly, unemployed people, retired people, and more.

Education Levels

We can also look at the education levels in 21791 to see how many people have a high school degree, a bachelor's degree, or a graduate degree.

Educational attainment is a good indicator of the overall education level of a population, and can be used to compare against other metrics such as the average income, per capita income, and more to see how education levels affect income, unemployment rates, and more.

  • Master's degree or higher
    10.99%
  • Bachelor's degree
    21.70%
  • Some college or associate's degree
    12.61%
  • High school diploma or equivalent
    52.31%
  • Less than high school diploma
    2.39%

Employment

Employment rates are all based around the total population in 21791 that are over the age of 16.

Currently, the total population of the 21791 zip over the age of 16 is 4,023.

Of those people, a total of 64.10% are working or actively looking for work. This is called the labor force participation rate.

The participation rate is a useful market measure because it shows the relative amount of labor resources available to the economy.

The employment to total population rate in 21791 is 61.80%.

Employment by Age

We can look at the employment rates by age to see how it compares to the overall employment rate. Here's how that breaks down for the 21791 zip code.

Age Population Participation Unemployment Rate
16 to 19 years 228 36.80% 13.10%
20 to 24 years 259 81.50% 18.50%
25 to 29 years 323 97.20% 2.60%
30 to 34 years 450 94.90% 0.20%
35 to 44 years 402 69.90% 1.40%
45 to 54 years 550 94.20% 0.00%
55 to 59 years 433 86.60% 0.00%
60 to 64 years 386 70.20% 0.00%
65 to 74 years 451 14.20% 1.60%
75 years and over 541 6.30% 0.00%

Employment by Race

Another very interesting employment statistic we can look at is the employment and unemployment rates by race in 21791. The table below shows the rates for each of the ethnicity groups types defined by the US Census Bureau (which we mentioned earlier in this article).

Age Population Participation Unemployment Rate
White 3,803 63.90% 2.40%
Black or African American 73 52.10% 2.60%
American Indian and Alaska Native 4 0.00% 0.00%
Asian 97 73.20% 0.00%
Native Hawaiian and Other Pacific Islander 0 0.00% 0.00%
Other 28 100.00% 0.00%
Two or more races 18 66.70% 41.70%
Hispanic or Latino 57 100.00% 14.00%
Not Hispanic or Latino 3,775 63.60% 2.10%

Occupations

In this section we can look at the most common occupations for people living in the 21791 area as well as the gender breakdown and earnings of them.

The total population of civilian employees that are 16 years old or older in 21791 is 2,488, with median earnings of $53,210.00.

Women in 21791 are earning approximately 73.50% of the men's earnings.

Population Earnings
Total 2,488 $53,210.00
Male 1,428 $59,483.00
Female 1,060 $43,716.00

Occupations by Category

In the table below, we can break down the population and earnings for 21791 even further by occupation. The list of occupation categories below will show you how many people are employed in each category and the median earnings of each profession.

Occupation Employed Earnings
Management 189 $78,438.00
Business and Financial 113 $69,050.00
Computer and Mathematical 112 $112,500.00
Architecture and Engineering 86 $74,095.00
Life, Physical, and Social Science 38 $250,001.00
Community and Social Service 28 $43,462.00
Legal 18 $61,429.00
Educational and Library 99 $51,648.00
Arts, Design, Entertainment, Sports, and Media 47 $78,068.00
Healthcare Practitioners 113 $68,583.00
Healthcare Support 42 $31,042.00
Firefighters and Protective Service 5 $0.00
Law Enforcement 214 $101,078.00
Food Preparation and Serving 75 $15,083.00
Building and Grounds Cleaning 164 $30,550.00
Personal Care and Service 51 $17,188.00
Sales 139 $36,328.00
Office and Administrative Support 321 $43,036.00
Farming, Fishing, and Forestry 2 $0.00
Construction and Extraction 146 $53,258.00
Installation, Maintenance, and Repair 187 $77,536.00
Production 155 $57,596.00
Transportation and Material Moving 90 $28,333.00

Occupations by Gender

Now we can also look at the occupations by category for 21791 when it is broken down by male and female.

This lets us see how many male and females work in each occupation, the median earnings, and the male to female ratio of earnings for 21791.

That last metric is important because it can be used to look at the gender pay gap between men and women.

Occupation Male Female
Population Earnings Population Earnings
Management 112 $59,583.00 77 $149,107.00
Business and Financial 42 $78,026.00 71 $68,650.00
Computer and Mathematical 90 $119,615.00 22 $0.00
Architecture and Engineering 83 $74,159.00 3 $0.00
Life, Physical, and Social Science 34 $250,001.00 4 $0.00
Community and Social Service 3 $0.00 25 $43,750.00
Legal 0 $0.00 18 $61,429.00
Educational and Library 2 $0.00 97 $51,688.00
Arts, Design, Entertainment, Sports, and Media 30 $77,955.00 17 $100,417.00
Healthcare Practitioners 5 $0.00 108 $69,000.00
Healthcare Support 14 $0.00 28 $29,167.00
Firefighters and Protective Service 3 $0.00 2 $0.00
Law Enforcement 174 $101,261.00 40 $0.00
Food Preparation and Serving 37 $25,208.00 38 $7,143.00
Building and Grounds Cleaning 128 $31,250.00 36 $21,667.00
Personal Care and Service 1 $0.00 50 $16,875.00
Sales 67 $68,125.00 72 $23,750.00
Office and Administrative Support 55 $55,096.00 266 $42,857.00
Farming, Fishing, and Forestry 0 $0.00 2 $0.00
Construction and Extraction 146 $53,258.00 0 $0.00
Installation, Maintenance, and Repair 187 $77,536.00 0 $0.00
Production 128 $59,615.00 27 $14,750.00
Transportation and Material Moving 60 $29,583.00 30 $6,250.00

Households and Family Size

A household is defined by the US Census Bureau as a group of people who occupy a housing unit. A housing unit is a house, apartment, mobile home, group of rooms, or single room occupied as separate living quarters.

There are currently 1,924 households in 21791, with an average household size of 2.49 people.

A family is defined as a group of two or more people related by birth, marriage, or adoption who live together in the same household.

There are 1,340 families living in the 21791 zip code with an average family size of 2.98 people.

Households by Marital Status

The four categories of household by marital status are:

  • Married-couple family
  • Male householder with no spouse present
  • Female household with no spouse present
  • Nonfamily household

The table below shows the total number of households and families, with the average sizes of each, that live in 21791:

Married Male Female Nonfamily
Total Households 1,198 59 83 584
Average Household Size 2.97 2.2 4.64 1.22
Total Families 1,198 59 83 0
Average Household Size 2.96 2.2 3.75 0

Poverty

Of the 1,340 families living in 21791, 4.60% are considered to be below the poverty threshold.

The table below shows the latest poverty thresholds in 21791:

Household Size Poverty Threshold
1 Person $14,580.00
2 People $19,720.00
3 People $24,860.00
4 People $30,000.00
5 People $35,140.00
6 People $40,280.00
7 People $45,420.00
8 People $50,560.00

Housing

There are 2,030 housing units in 21791.

The table below shows the split between occupied and vacant units:

Total Percentage
Occupied 1,924 94.78%
Vacant 106 5.22%

16.55% of the total 2,030 housing units in 21791 are rental units. This is approximately 336 properties.

For owner-occupied housing units, a total of 1,562 are occupied by the owner - or 76.95% of the total.

Rental Rates

The median rent for a property in 21791 is $1,139.00.

In the chart below, we can look at the number of rental properties in 21791 that fall into a particular rent range. These can then be used to compare with other areas, or to see how they have changed over time.

  • No rent paid
    26
  • Less than $500
    19
  • $500 to $999
    119
  • $1,000 to $1,499
    143
  • $1,500 to $1,999
    48
  • $2,000 to $2,499
    7
  • $2,500 to $2,999
    0
  • $3,000 or more
    0

Property Value

The median value of a property in 21791 is $326,600.00.

Just like with rental rates, we can look at the number of properties in 21791 that fall into a particular value range.

  • Less than $50,000
    8
  • $50,000 to $99,999
    10
  • $100,000 to $149,999
    65
  • $150,000 to $199,999
    143
  • $200,000 to $299,999
    444
  • $300,000 to $499,999
    595
  • $500,000 to $999,999
    233
  • $1,000,000 or more
    64

Property Age

We can also look at the age of properties in 21791. The chart below shows the number of properties in 21791 that fall into a particular age range.

  • 1939 or earlier
    749
  • 1940 to 1949
    105
  • 1950 to 1959
    68
  • 1960 to 1969
    315
  • 1970 to 1979
    245
  • 1980 to 1989
    239
  • 1990 to 1999
    170
  • 2000 to 2009
    112
  • 2010 to 2013
    15
  • 2014 or later
    12

Vehicles per Household

The number of vehicles available per household can be a good indicator of the level of affluence in an area. The chart below shows the number of households in 21791 that have a particular number of vehicles available.

  • No vehicles available
    60
  • 1 vehicle available
    341
  • 2 vehicles available
    710
  • 3 or more vehicles available
    813

Commuting to Work

In this section, we can also look at how people in 21791 get to work. The chart below shows the number of people in 21791 that commute to work in a particular way.

38.5 minutes is the average travel time to work for people in 21791.

These commute times can be compared to other date like income and educational levels to see how they relate to each other and if there are any trends in the data that might suggest a correlation.

  • Less than 5 minutes
    101
  • 5 to 9 minutes
    121
  • 10 to 14 minutes
    99
  • 15 to 19 minutes
    158
  • 20 to 24 minutes
    351
  • 25 to 29 minutes
    152
  • 30 to 34 minutes
    227
  • 35 to 39 minutes
    102
  • 40 to 44 minutes
    66
  • 45 to 59 minutes
    369
  • 60 to 89 minutes
    402
  • 90 or more minutes
    164

Summary

We've covered a LOT of demographic and population data for 21791 in this article! Hopefully you have found it very useful in your research of the area.

If you use any of the data found on this page, please consider linking back to USPopulation.org as the source and if you have any feedback or data requests, click here to contact us.

States in 21791

If you want to see how the population and demographics of 21791 compare to other zip codes in Maryland, check out the list of all Maryland zip codes below: