St. Johns County, FL population by gender
The table below shows St. Johns County's population by gender
Gender | Population | % of Total Population |
---|---|---|
Female | 135,687 | 51.06% |
Male | 130,037 | 48.94% |
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St. Johns County, FL population by gender, in percentage
The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 51.06% females and 48.94% males in St. Johns County, FL.
The above comparison shows there are more females than males in the St. Johns County county as compared to the nation.

St. Johns County, FL gender ratio
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
In St. Johns County, FL, there are less men than women. The St. Johns County, FL gender ratio is 95.8:100 i.e. 95.8 men to 100 women (0.958).
This ratio is lower than the national average of 98:100 i.e 98 men to 100 women (0.980).
St. Johns County, FL gender ratio by age
In St. Johns County, FL, the sex ratio for children under 18 years is 102.4 boys per 100 girls (102.4:100).Having said that, for seniors aged 80 and older, there are 74.6 males per 100 females (74.6:100).
On the national level, the sex ratio (male per 100 females) for under 18 age group is 104.8:100, and 64.5:100 for the senior population 80 years and older.
The table below lists the male and female population in each age group along with the gender ratio for St. Johns County, FL.
Age Group | Population (Male) | Population (Female) | Gender Ratio |
---|---|---|---|
Under 5 years | 6,381 | 6,516 | 0.98 |
5 to 9 years | 8,135 | 7,644 | 1.06 |
10 to 14 years | 9,307 | 9,281 | 1.00 |
15 to 19 years | 8,999 | 8,152 | 1.10 |
20 to 24 years | 5,953 | 6,250 | 0.95 |
25 to 29 years | 5,671 | 5,643 | 1.00 |
30 to 34 years | 6,548 | 7,169 | 0.91 |
35 to 39 years | 8,119 | 9,468 | 0.86 |
40 to 44 years | 9,156 | 8,575 | 1.07 |
45 to 49 years | 9,440 | 9,269 | 1.02 |
50 to 54 years | 9,189 | 9,369 | 0.98 |
55 to 59 years | 9,542 | 9,977 | 0.96 |
60 to 64 years | 8,717 | 9,838 | 0.89 |
65 to 69 years | 8,561 | 8,980 | 0.95 |
70 to 74 years | 7,264 | 8,419 | 0.86 |
75 to 79 years | 4,503 | 5,035 | 0.89 |
80 to 84 years | 2,186 | 2,944 | 0.74 |
85 years and over | 2,366 | 3,158 | 0.75 |
Interesting observation from the above table:
- The sex ratio at birth is 0.979 i.e. 97.9 boys per 100 girls.
- For the 60-64 years, the sex ratio is 0.886 i.e. 11.4 less men per 100 women.
- While for senior most population of 85+ age group, the sex ratio is 0.749 i.e. 74.9 senior men per 100 senior women.
St. Johns County, FL population by gender & age
For male population, the largest age group is 55-59 years with a population of 9,542. Whereas, for the female population, the largest age group is 55-59 years with a population of 9,977.
As you can note from the above numbers, the largest age group for men and women are same. The above comparison also shows that there are 435 more females than males, in the age group 55-59 years (The largest age group for both of the genders).

Under the age of 5, there are 6,381 boys and 6,516 girls in St. Johns County, FL. Thus there are 135 less boys than girls under the age of 5.
Between the age group of 60-64 years, there are 8,717 males and 9,838 females in St. Johns County, FL. Thus there are 1,121 less males than females between the age of 60 and 64 years.
For the senior most age group of 85+ years, there are 2,366 males and 3,158 females.
Things to know
What percent of St. Johns County, FL is female?
According to the ACS survey, of the total St. Johns County, FL population of 265,724, 51.06% percent are females.
What percentage of St. Johns County, FL is male?
According to the ACS survey, of the total St. Johns County, FL population of 265,724, 48.94% percent are males.
What is the male to female ratio in St. Johns County, FL?
In St. Johns County, FL, the male to female ratio is 95.8:100 i.e. 95.8 men to 100 women (0.958).
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates