The aim of this study was, on the basis of the positive psychology perspective, to investigate how optimism (LOT-r, Scheier, Carver, & Bridges, 1994) relates to happiness (OHQ, Hills & Argyle 2002) and life satisfaction (SWLS, Diener, Emmons, Larsen & Griffin, 1985) and the influence of gender, age and marital status. The study also examined what makes people happy. The selection was made by the snowball method and 106 respondents participated in which 47 were male and 59 were women. Marital status was divided into three categories, married / partner, live-apart and single. Age was divided into three categories, 18-29, 30-49 and 50-74. Statistical analyses were made with non-parametric tests. The results showed that optimism was correlated positively with happiness and life satisfaction in all categories except for the live-apart where there was no correlation between optimism and life satisfaction. There were significant differences in the age group in terms of life satisfaction. What made people happy were family (51.5%), friends / relations (36.4) and leisure (35.4%).