Purpose: The purpose of the study was to examine knowledge about, attitudes to sex, and educational needs of community-dwelling elderly adults, and to compare differences by gender. Methods: A descriptive correlational study design was used. Participants were 202 elderly men and women recruited in 2011. Data were analyzed using descriptive statistics, t-test, ANOVA with Scheffe? test, ANCOVA, and Pearson's correlation. Results: Knowledge was significant by economic status and sexual activity in men, and sexual activity in women. Attitude was significant by age and perception of own health in men, and age and sexual activity in women. Educational needs were significant by sexual activity in men, and age and sexual activity in women. Significant differences in knowledge (F=8.74, p=.004), attitude (F=18.50, p<.001), and educational needs (F=16.40, p<.001) were found between men and women. There were significant correlations between knowledge and attitude (r=.37, p<.001), and between knowledge and educational needs (r=.24, p=.008) in men, and between knowledge and attitude (r=.42, p<.001), between knowledge and educational needs (r=.29, p=.010), and between attitude and educational needs (r=.45, p<.001) in women. Conclusion: Gender sensitive sex education and interventional programs should be developed for this population to improve attitudes and increase knowledge regarding sex.