Abstract
This study examines the relationship between birth order and life satisfaction across several factors—financial stability, faith and values, career, growth and development, and life partner—among young adults in Bacoor, Cavite. Grounded in Adler's Birth Order Theory and the Bottom-Up Theory of life satisfaction, this quantitative research involved 150 respondents aged 18-25, categorized by birth position (firstborn, middleborn, lastborn, and only child). Data were collected through a self-made questionnaire, employing a Likert scale to assess responses across five life satisfaction domains. Descriptive statistics and ANOVA tests were used to analyze the data. Results showed a significant difference in perceived financial stability across birth orders, with firstborn and lastborn respondents showing higher financial stability than only children. However, no significant differences were found in the other factors of life satisfaction across birth orders. The study concludes that while birth order may influence financial stability, it has minimal impact on other aspects of life satisfaction. Further research with a larger and more diverse sample is recommended to explore additional variables, such as family status and interpersonal relationships, to better understand how birth order affects life satisfaction.