This study examines the composition and characteristics of social capital in Hanoi and Ho Chi Minh City, two cities representing the North and South of Vietnam, using data from the World Values Survey(WVS) 5th (2006) and 7th (2020) using chi-square tests and T-tests. The results of the analysis show that family values and in-group trust have been strengthened in Vietnam. In terms of social networks, Vietnamese people still consider family-centered informal ties to be the most important, while formal ties involving membership in various organizations have decreased. In terms of trust, in-group trust, especially trust in family, was found to be higher than out-group trust. Comparing the two cities, Hanoi has a higher level of out-group trust than Ho Chi Minh City, but in Ho Chi Minh City, trust in people met for the first time has decreased compared to the past. Based on these analysis results, it explains that family values have been transformed into cultural awareness through institutionalization through party and state policies, laws, and directives in Vietnam, and that the role of the cultural family movement has been important in this process.