In South Korea, approximately 70.69 percent of the population was between 15 and 64 years old in 2023, while those above the age of 64 made up around 18.34 percent. The youngest generation made up an even smaller percentage than the elderly, but were the only group that did not increase in size over the last decade, partly due to a decrease in births since 2007. Reasons for fewer children While it is not always the case that family sizes shrink when there are less births per woman, the fertility rate in South Korea is undisputably decreasing overall and less children are born. The reasons people cite for having fewer children vary greatly by gender and marital status in South Korea: For example, more married people than singles - and of those more married women than men - say that the difficulty of maintaining a work life balance is the largest concern for them. Meanwhile, men express more economic concerns about child support, and notably more singles nowadays say they feel no need to have children.

In 2025, the total population of South Korea is projected to be around ***** million. In thirty years, the number of people aged 15 to 64 is estimated to decrease by one-third, while the number of older adults is anticipated to more than double. Additionally, the overall population is expected to decline by around *** million people by that time. Declining birth rate Several factors are contributing to the expected demographic changes in South Korea. Firstly, the birth rate has been declining for years. As of 2024, South Korea had the lowest fertility rate in the world. This trend continues despite the efforts of successive governments to encourage young people to have children. An increasing number of South Korean women are prioritizing their careers, often choosing to focus on work rather than starting a family at a young age. While the employment rate for South Korean women is still lower than that of men, it has steadily risen over the past decade. Increase in life expectancy Secondly, life expectancy in South Korea has steadily increased due to improved living standards and healthcare. The average life expectancy at birth for South Koreans has risen from less than 75 years to almost 83 years over the past twenty years. As a result, the proportion of people aged 65 and older has grown from less than ** percent to around ** percent in the last decade.

In 2024, the largest age group in Seoul, South Korea's capital, was those aged 25 to 29, totaling approximately ******* individuals. Seoul is home to about ** percent of the total population

According to a survey among content creators with a YouTube channel in South Korea, most respondents were in their thirties, at a share of ** percent in 2023. Following were content creators in their twenties or below that at roughly **** percent.

As of May 2023, around ** percent of convenience store mobile app users in South Korea were in their twenties. The majority of users, around ** percent, were aged between 20 and 49 years old. Convenience store applications regularly offer promotions and mostly have point collection systems for further membership benefits.

According to data collected across ***** mobile applications in ** different industries in South Korea in 2023, ** percent of education-related application users were people in their forties. People aged between 20 and 49 made up the large majority of users in every category of mobile applications.

As of April 2020, ** percent of users for "Only my refrigerator" mobile application by South Korean convenience store GS25 were in their thirties. Across all three convenience store apps, this age group had the largest share of users.

In 2023, Songpa-gu had the largest population among the ** districts in Seoul, South Korea, with around ***** thousand inhabitants. That year, the total population of Seoul stood at about *** million.

In 2024, the population aged 65 or older in South Korea made up approximately ** percent of the total population. The share of older people in the total population has almost tripled in the last two decades.

As of 2024, ** percent of TikTok users in South Korea were between 18 and 24 years old. The following age bracket of 25 to 34 years olds made up ** percent of users.

In 2024, the population of Gyeonggi Province in South Korea stood at around **** million. Seoul followed with about *** million inhabitants. The total population of South Korea stood at around **** million that year.

According to a survey conducted in South Korea in 2024, restaurants in South Korea reported that their main customer base was in their fifties, with one in four customers being in that age range. Restaurant visitors aged between 30 and 59 years made up over ** percent of the customer base.

The internet penetration among the population in South Korea in 2024 was the highest among people between 10 and 49 years old, at almost 100 percent in each age group. Among the elderly of 70 years and older the internet usage rate was the lowest.

As of August 28, 2023, around 59.8 percent of the patients who died from novel coronavirus (COVID-19) in South Korea were aged 80 years or older. This was despite older people making up only a small percentage of all COVID-19 cases in South Korea. A fourth wave fueled by the delta and omicron variants led to a record rate of new daily cases in 2022, which once again began to decline in 2023.

For further information about the coronavirus (COVID-19) pandemic, please visit our dedicated Facts and Figures page.

According to data provided by NapoleonCat as of April 2025, around **** percent of Instagram users in South Korea were women aged 25 to 34 years. For most age groups, there were more women than men active on Instagram.

As of March 2021, most users of second-hand mobile shopping applications in South Korea were in their twenties, with a user share of **** percent. Shoppers in their thirties and forties followed, reaching a user share of **** and **** percent respectively.

In 2022, around 53 percent of the population aged between 25 and 64 years old in South Korea completed tertiary education, while about 38.4 percent of the adult population completed upper secondary education. South Korea was above the OECD average for adult tertiary educational levels that year.

In June 2023, roughly ** percent of Daangn Market Android application users in South Korea were in their forties, closely followed by users in their thirties at around ** percent of users. Daangn Market, also called Karrot Market, is a South Korean neighborhood and community app used for second-hand transactions.

According to data collected in February 2023, people in their twenties accounted for around **** percent of Olive Young mobile application users. Olive Young is the health and beauty shop brand of CJ Corporation.

As of February 2022, **** percent of South Korean users of online dictionary mobile application Naver Dictionary were in their twenties, making it the age group with the most users. The age group using it the least were people in their thirties, accounting for only *** percent of users.