Interrelationships between measures of satisfaction with a variety of life domains were used to test the similarity of the underlying factor structure of subjective well-being across age levels. Data on three sets of measures from two cross-sections of American adults were analyzed by confirmatory factor analysis. Findings indicate that for respondents of age levels between 25 and 75, the nature of the underlying factors are similar. At the same time, small age differences are observed for the variance of and the interrelationships between these factors.