This paper presents an analysis of the characteristics of the economic phenomenon of happiness and its aspects in the self-employed population in Lithuania. This mixed empirical study uses statistical data, correlational analyzes, and the X^2 criterion. The research data are collected using the methods of questionnaire survey, time diary, and semi-structured expert interview. The concept of happiness is defined based on the results of empirical analysis, which also demonstrate that in 2019 self-employed persons in Lithuania were happy and satisfied with their work and personal life. The research results also reveal that there is a statistically significant relationship between the employed population seeking to balance work and personal life and the level of happiness.