The COVID-19 pandemic has had far-reaching consequences worldwide and has also led to significant changes in people’s lifestyles, resulting in an increase in social problems, such as early marriages for girls in different contexts. This study aimed to examine the relationship between the COVID-19 pandemic and early marriage among girls. Our analysis of 36 studies published between 2020 and 2023 shows that the pandemic has accelerated the number of early marriages for girls in several ways. In many countries, early marriages often result from social disintegration, loss of social support, inability to pay for basic needs, prolonged school closures, economic collapse, and parental death due to COVID-19. Although people in different contexts have different opinions about early marriages for girls due to COVID-19, there is evidence that early marriages for girls are sometimes seen as a solution to ease the financial burden and reduce stress for parents. However, there was a significant decline in traditional marriages in developed countries during the COVID-19 pandemic, including the United States, Mexico, Japan, Korea, and Indonesia. Early marriage can have serious consequences for young adolescents, including mental health problems, such as depression, anxiety, low self-esteem, and feelings of powerlessness. Mixed results, such as an increase or decrease in early marriage among girls, indicate a need for detailed contextual empirical research. It is known that actions are being taken to reduce the prevalence of early marriages, especially in developing countries, but certain situations may accelerate or reverse trends in girls’ early marriages because of various social, economic, and cultural influences. This study suggests further consideration of strategic planning for emergencies, such as the COVID-19 pandemic, that people may face again in the future. Therefore, it is necessary to implement appropriate support for abused and mistreated girls by raising awareness to reduce the psychological and physiological consequences of early marriage due to the pandemic in the near past.