21231 Zip Code Population and Demographics

In this article, we'll explore the population statistics for the zip code 21231, including popular demographics data like median age, number of households, household income, gender, employment and unemployment rates, occupations, religion, and more.

21231 is a zip code in Baltimore city, Maryland, which covers Baltimore, with a total population of 15,746 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 21231 zip code. The most basic data is the total population, which is the total number of people living in 21231.

The estimated population of people living in 21231 is 15,746, with a median age of 32.4.

We can look back at data from previous years to see how the population in the 21231 area has changed over the last 5 years.

Year Population Change 5-Year Change
2021
15,746
 -1.01% -5.88%
2020
15,906
+0.33%
-
2019
15,854
 -1.89% -
2018
16,160
 -3.4% -
2017
16,729
 - -

Population of 21231 by Race and Ethnicity

How much has the race and ethnicity of the population in the 21231 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
53.8%
51.3%
 +4.87%
Black/African American
28.3%
30.4%
 -6.91%
Native
0.1%
0.3%
 -66.67%
Hispanic
8.8%
10.6%
 -16.98%
Asian
5.6%
4.4%
 +27.27%
Hawaiian/Pacific Islander
0%
0%
 0.00%
Two Or More Races
2.9%
3%
 -3.33%
Other
0.5%
0.1%
 +400.00%

This data can be very important for anybody studying the 21231 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 21231 by Age and Gender

We can also monitor the change of the age and gender in the 21231 zip code to track track trends in the population over time.

We can see how the population in 21231 has changed over the last 5 years by median age as a total, and also by male and female.

Year Total Male Female
2021 32.4 +1.25% 32.4 +2.21% 32.4 +0.62%
2020 32 -1.23% 31.7 -3.94% 32.2 +0.63%
2019 32.4 -1.22% 33 -1.79% 32 -0.31%
2018 32.8 +1.55% 33.6 +1.2% 32.1 +2.56%
2017 32.3 - 33.2 - 31.3 -

The median age of the 21231 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 21231 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 9 669 -8.59% 784 -9.1% 610 711
10 to 19 643 -4.1% 640 -16.15% 607 542
20 to 29 1,978 +9.22% 2,436 -22.41% 2,094 1,933
30 to 39 1,929 -4.46% 1,860 +15.86% 1,833 2,148
40 to 49 920 -7.01% 830 -10.13% 853 729
50 to 59 1,229 -33.6% 793 -24.01% 864 611
60 to 69 539 +24.2% 566 +12.11% 664 633
70+ 377 -1.31% 536 +4.48% 361 553

Median Household Income

The latest median household income for the 21231 zip code is $73,089.00.

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 21231.

  • Under 25
    $92,750.00
  • 25 to 44
    $90,662.00
  • 45 to 64
    $62,397.00
  • 65 and over
    $25,000.00

Average Household Income

Whenever we ask what is the average household income in the 21231 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 21231, 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 21231 is currently $102,549.00.

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.

13.98% of households in 21231 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 21231 against other zip codes.

  • Less than $24,999
    22.27%
  • $25,000 to $49,999
    13.59%
  • $50,000 to $74,999
    14.81%
  • $75,000 to $99,999
    11.62%
  • $100,000 to $149,999
    14.61%
  • $150,000 to $199,999
    9.12%
  • $200,000 or more
    13.98%

Per Capita Income

The per capita income in 21231 is $53,895.00.

Per capita income is the average income of a person in a given area. It is calculated by dividing the total income of 21231 by the total population of 21231.

This is different from the average or mean income because it includes and accounts for all people living in the 21231 area, including people like children, the elderly, unemployed people, retired people, and more.

Education Levels

We can also look at the education levels in 21231 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
    26.29%
  • Bachelor's degree
    48.46%
  • Some college or associate's degree
    5.28%
  • High school diploma or equivalent
    17.92%
  • Less than high school diploma
    2.04%

Employment

Employment rates are all based around the total population in 21231 that are over the age of 16.

Currently, the total population of the 21231 zip over the age of 16 is 13,487.

Of those people, a total of 73.40% 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 21231 is 70.90%.

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 21231 zip code.

Age Population Participation Unemployment Rate
16 to 19 years 211 21.80% 45.70%
20 to 24 years 905 87.00% 6.20%
25 to 29 years 3,122 85.90% 0.40%
30 to 34 years 2,284 89.10% 1.30%
35 to 44 years 2,483 80.40% 2.80%
45 to 54 years 1,603 77.20% 6.70%
55 to 59 years 668 73.20% 1.20%
60 to 64 years 674 44.80% 2.60%
65 to 74 years 1,138 28.30% 14.30%
75 years and over 399 0.00% 0.00%

Employment by Race

Another very interesting employment statistic we can look at is the employment and unemployment rates by race in 21231. 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 8,409 81.30% 1.40%
Black or African American 3,489 53.30% 7.30%
American Indian and Alaska Native 35 60.00% 0.00%
Asian 875 79.30% 5.60%
Native Hawaiian and Other Pacific Islander 0 0.00% 0.00%
Other 253 63.60% 13.70%
Two or more races 426 75.80% 3.10%
Hispanic or Latino 1,032 69.60% 0.70%
Not Hispanic or Latino 7,916 82.40% 1.50%

Occupations

In this section we can look at the most common occupations for people living in the 21231 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 21231 is 9,561, with median earnings of $65,188.00.

Women in 21231 are earning approximately 76.20% of the men's earnings.

Population Earnings
Total 9,561 $65,188.00
Male 4,965 $75,679.00
Female 4,596 $57,652.00

Occupations by Category

In the table below, we can break down the population and earnings for 21231 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 1,307 $86,208.00
Business and Financial 1,497 $92,742.00
Computer and Mathematical 696 $93,284.00
Architecture and Engineering 279 $112,386.00
Life, Physical, and Social Science 506 $53,727.00
Community and Social Service 163 $53,250.00
Legal 208 $83,846.00
Educational and Library 764 $56,445.00
Arts, Design, Entertainment, Sports, and Media 434 $68,973.00
Healthcare Practitioners 1,402 $62,738.00
Healthcare Support 76 $18,750.00
Firefighters and Protective Service 89 $54,550.00
Law Enforcement 25 $91,625.00
Food Preparation and Serving 231 $17,995.00
Building and Grounds Cleaning 175 $23,962.00
Personal Care and Service 105 $20,592.00
Sales 465 $54,250.00
Office and Administrative Support 597 $43,508.00
Farming, Fishing, and Forestry 5 $0.00
Construction and Extraction 133 $19,841.00
Installation, Maintenance, and Repair 80 $78,596.00
Production 140 $60,156.00
Transportation and Material Moving 74 $20,703.00

Occupations by Gender

Now we can also look at the occupations by category for 21231 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 21231.

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 700 $101,389.00 607 $68,188.00
Business and Financial 911 $93,700.00 586 $74,130.00
Computer and Mathematical 552 $93,750.00 144 $78,036.00
Architecture and Engineering 244 $118,913.00 35 $82,813.00
Life, Physical, and Social Science 184 $92,857.00 322 $53,023.00
Community and Social Service 68 $60,833.00 95 $38,750.00
Legal 103 $84,327.00 105 $82,153.00
Educational and Library 275 $70,245.00 489 $55,684.00
Arts, Design, Entertainment, Sports, and Media 235 $72,688.00 199 $68,906.00
Healthcare Practitioners 521 $63,047.00 881 $62,240.00
Healthcare Support 4 $0.00 72 $17,500.00
Firefighters and Protective Service 44 $54,891.00 45 $17,344.00
Law Enforcement 0 $0.00 25 $91,625.00
Food Preparation and Serving 82 $7,228.00 149 $18,668.00
Building and Grounds Cleaning 63 $0.00 112 $22,627.00
Personal Care and Service 23 $15,625.00 82 $21,184.00
Sales 303 $54,375.00 162 $53,000.00
Office and Administrative Support 197 $64,844.00 400 $40,865.00
Farming, Fishing, and Forestry 5 $0.00 0 $0.00
Construction and Extraction 133 $19,841.00 0 $0.00
Installation, Maintenance, and Repair 80 $78,596.00 0 $0.00
Production 125 $61,328.00 15 $12,083.00
Transportation and Material Moving 65 $21,055.00 9 $0.00

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 7,975 households in 21231, with an average household size of 1.96 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 2,768 families living in the 21231 zip code with an average family size of 2.85 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 21231:

Married Male Female Nonfamily
Total Households 1,859 129 780 5,207
Average Household Size 2.7 4.2 3.18 1.45
Total Families 1,859 129 780 0
Average Household Size 2.69 3.83 3.08 0

Poverty

Of the 2,768 families living in 21231, 19.40% are considered to be below the poverty threshold.

The table below shows the latest poverty thresholds in 21231:

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 9,255 housing units in 21231.

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

Total Percentage
Occupied 7,975 86.17%
Vacant 1,280 13.83%

57.15% of the total 9,255 housing units in 21231 are rental units. This is approximately 5,289 properties.

For owner-occupied housing units, a total of 2,631 are occupied by the owner - or 28.43% of the total.

Rental Rates

The median rent for a property in 21231 is $1,462.00.

In the chart below, we can look at the number of rental properties in 21231 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
    55
  • Less than $500
    1,140
  • $500 to $999
    511
  • $1,000 to $1,499
    1,101
  • $1,500 to $1,999
    1,269
  • $2,000 to $2,499
    555
  • $2,500 to $2,999
    370
  • $3,000 or more
    343

Property Value

The median value of a property in 21231 is $297,000.00.

Just like with rental rates, we can look at the number of properties in 21231 that fall into a particular value range.

  • Less than $50,000
    50
  • $50,000 to $99,999
    56
  • $100,000 to $149,999
    128
  • $150,000 to $199,999
    250
  • $200,000 to $299,999
    862
  • $300,000 to $499,999
    921
  • $500,000 to $999,999
    341
  • $1,000,000 or more
    23

Property Age

We can also look at the age of properties in 21231. The chart below shows the number of properties in 21231 that fall into a particular age range.

  • 1939 or earlier
    4,798
  • 1940 to 1949
    394
  • 1950 to 1959
    634
  • 1960 to 1969
    463
  • 1970 to 1979
    365
  • 1980 to 1989
    445
  • 1990 to 1999
    310
  • 2000 to 2009
    752
  • 2010 to 2013
    1,052
  • 2014 or later
    42

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 21231 that have a particular number of vehicles available.

  • No vehicles available
    2,034
  • 1 vehicle available
    3,913
  • 2 vehicles available
    1,690
  • 3 or more vehicles available
    338

Commuting to Work

In this section, we can also look at how people in 21231 get to work. The chart below shows the number of people in 21231 that commute to work in a particular way.

25.8 minutes is the average travel time to work for people in 21231.

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
    97
  • 5 to 9 minutes
    461
  • 10 to 14 minutes
    1,060
  • 15 to 19 minutes
    1,551
  • 20 to 24 minutes
    920
  • 25 to 29 minutes
    743
  • 30 to 34 minutes
    1,203
  • 35 to 39 minutes
    269
  • 40 to 44 minutes
    298
  • 45 to 59 minutes
    547
  • 60 to 89 minutes
    431
  • 90 or more minutes
    155

Summary

We've covered a LOT of demographic and population data for 21231 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 21231

If you want to see how the population and demographics of 21231 compare to other zip codes in Maryland, check out the list of all Maryland zip codes below: