St. Marys County, MD population age distributions
A complete breakdown of St. Marys County's age demographics from 0 to 85 years, distributed across 18 age groups is listed in the table below.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 5 years | 6,961 | 6.12% |
| 5 to 9 years | 7,841 | 6.89% |
| 10 to 14 years | 7,669 | 6.74% |
| 15 to 19 years | 8,216 | 7.22% |
| 20 to 24 years | 6,988 | 6.14% |
| 25 to 29 years | 7,807 | 6.86% |
| 30 to 34 years | 7,962 | 7% |
| 35 to 39 years | 8,343 | 7.33% |
| 40 to 44 years | 6,795 | 5.97% |
| 45 to 49 years | 6,725 | 5.91% |
| 50 to 54 years | 7,925 | 6.96% |
| 55 to 59 years | 8,200 | 7.2% |
| 60 to 64 years | 7,212 | 6.34% |
| 65 to 69 years | 4,971 | 4.37% |
| 70 to 74 years | 4,095 | 3.6% |
| 75 to 79 years | 2,672 | 2.35% |
| 80 to 84 years | 1,680 | 1.48% |
| 85 years and over | 1,752 | 1.54% |
TABLE OF CONTENTS
St. Marys County, MD population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
St. Marys County, MD population by age group.
The largest age group is 35 to 39 years with a population of 8,343 (7.33% of the total population).
The largest age group in St. Marys County, MD was for the group of age 35 to 39 years with a population of 8,343 (7.33%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in St. Marys County, MD was the 80 to 84 years with a population of 1,680 (1.48%).
St. Marys County, MD population by age cohort
To better understand the age distribution of St. Marys County, MD's population, we divided it into the following 3 cohorts:
- Children : Under the age of 18 years
- Adults (working population): Between the age of 18 and 64 years
- Seniors: 65 years and above
FIGURE 2
St. Marys County, MD population by age cohort
The largest age group was 18 to 64 years with a population of 71,383 (62.72% of the total population).
St. Marys County, MD population by age cohort
Here's the population for each of the three cohorts.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 18 years | 27,261 | 23.95% |
| 18 to 64 years | 71,383 | 62.72% |
| 65 years and over | 15,170 | 13.33% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- St. Marys County 's population under 18 was 23.95%, compared to the 22.11% nationwide.
- St. Marys County's working population (between 18 and 64) was 62.72%, compared to 61.36% nationwide.
- St. Marys County's elderly or the senior population (over 65 age) was 13.33% as compared to 16.53% nationwide.
St. Marys County, MD population pyramid
Population pyramid for St. Marys County, MD is charted below using the estimates from U.S. Census Bureau's American Community Survey 5-Year estimates. A wide base suggests population increase, narrow base indicates declining birth rates.
Key stats from our analysis of the St. Marys County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for St. Marys County, MD, is 29.5.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for St. Marys County, MD, is 19.9.
- Total dependency ratio for St. Marys County, MD is 49.4.
- Potential support ratio, which is the number of youth (working age population) per elderly, for St. Marys County, MD is 5.0.
FIGURE 3
St. Marys County, MD population pyramid
St. Marys County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
St. Marys County, MD population pyramid
Here's the St. Marys County, MD's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 3,514 | 3,447 | 6,961 |
| 5 to 9 years | 4,366 | 3,475 | 7,841 |
| 10 to 14 years | 3,554 | 4,115 | 7,669 |
| 15 to 19 years | 4,282 | 3,934 | 8,216 |
| 20 to 24 years | 3,638 | 3,350 | 6,988 |
| 25 to 29 years | 4,010 | 3,797 | 7,807 |
| 30 to 34 years | 4,118 | 3,844 | 7,962 |
| 35 to 39 years | 4,377 | 3,966 | 8,343 |
| 40 to 44 years | 3,220 | 3,575 | 6,795 |
| 45 to 49 years | 3,318 | 3,407 | 6,725 |
| 50 to 54 years | 4,003 | 3,922 | 7,925 |
| 55 to 59 years | 4,201 | 3,999 | 8,200 |
| 60 to 64 years | 3,689 | 3,523 | 7,212 |
| 65 to 69 years | 2,264 | 2,707 | 4,971 |
| 70 to 74 years | 2,102 | 1,993 | 4,095 |
| 75 to 79 years | 1,332 | 1,340 | 2,672 |
| 80 to 84 years | 851 | 829 | 1,680 |
| 85 years and over | 569 | 1,183 | 1,752 |
Things to know
What is the population of St. Marys County, MD under 18?
St. Marys County's population under the age of 18 is 27,261, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 23.95% of the total resident population of St. Marys County, MD.
What is the aging population in St. Marys County, MD?
St. Marys County's population aged 65 years and above was 15,170. As per the U.S. Census Bureau's American Community Survey, this population is 13.33% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates