Births outside marriage in Korea hit record high as family norms shift

The number of babies born outside wedlock in Korea hit a record 14,023 last year, more than double the figure five years earlier, as more couples decouple childbirth from marriage.

A single office worker surnamed Jang sees marriage and childbirth as separate choices. "I don't necessarily need to get married, but I want to have a child, so I'm considering freezing my eggs," she said.

Kim, who is in the early stages of pregnancy, lives with her husband but has not yet registered their marriage. "We're having a baby, but I don't think we need to register the marriage right away," she said. "Given things like housing subscriptions, there doesn't seem to be a reason to rush."

The idea that marriage and childbirth must go together is losing ground. According to the Ministry of Data and Statistics on Sunday, births outside wedlock reached 14,023 last year, the highest since related statistics began in 1981. The figure has more than doubled from 6,876 in 2020. Their share of total births rose from 2.52 percent in 2020 to 5.80 percent in 2024, before edging down slightly to 5.51 percent last year as overall births increased.

The trend is attributed to a growing number of couples not automatically pairing marriage with childbirth, more diverse family structures and, in some cases, couples delaying marriage registration for financial reasons.

Social attitudes are shifting quickly as well. In a 2024 Korean Statistical Information Service social survey, 37.2 percent of respondents said it is acceptable to have children without marrying, up 14.7 percentage points from 22.5 percent in 2014. Among people in their 20s, the figure reached 42.8 percent.

Analysts point to women's growing economic independence and more flexible social attitudes toward voluntary childbirth outside marriage. A rising number of young people are also forming households through cohabitation rather than marriage, seeking to avoid the high costs of wedding preparations and rigid family hierarchies in favor of practical partnerships and shared living arrangements.

"Social acceptance of families formed outside marriage is improving," said Kim Young-chul, a professor of economics at Sogang University. "Institutional systems need to be established so that forming a family and raising children outside marriage is not disadvantageous."

There are also practical incentives to delay marriage registration — a so-called marriage penalty that can make couples worse off in housing subscriptions and loans after marrying. Under the government's loan program, single borrowers currently qualify with annual income up to 70 million won ($50,800), while married couples qualify with combined income up to 85 million won. Starting in October, the criteria will ease to combined income of 85 million won or either partner earning 70 million won or less, but gaps will remain. For example, a couple earning a combined 150 million won would qualify if one partner earns 90 million won and the other 60 million won, but would not qualify if each partner earns 75 million won.

Critics say institutional change has lagged behind Korea's changing family structures. A "life partnership act," which would legally recognize the shared households of two unmarried adults and grant them certain rights and obligations, was first proposed in 2023 but died with the end of that parliamentary term. It was reintroduced in the National Assembly last September, but discussions have stalled. In comparison, France operates its Civil Solidarity Pact, the Netherlands has registered partnerships and Sweden allows unmarried women access to assisted reproduction.

Births outside marriage encompass a range of cases, including cohabiting couples, couples who have delayed marriage registration and births to unmarried mothers.

"This reflects a shift away from the assumption that marriage and childbirth must follow in sequence, and a weakening of the link between the two," said  Byoun Soo-jung, a research fellow at the Korea Institute for Health and Social Affairs. "But current statistics don't distinguish between different types of births outside marriage, so the statistical system needs to be improved to capture cohabitation status and family structure."

"Public acceptance of diverse family forms has grown, but institutions haven't kept pace, often citing a lack of social consensus," said Heo Min-sook, a legislative investigator at the National Assembly Research Service. "Changing realities need to be reflected institutionally in areas like health care, caregiving and welfare as well."

BY PARK HYUN-JU [lee.jian@joongang.co.kr]