SUMMARYWe assessed if there has been a decline in the median number of reported lifetime sexual partners in Kenya following the AIDS epidemic. The Wilcoxon rank-sum test was used to compare the median and interquartile range (IQR) of the number of lifetime sexual partners for men aged 20–54 years in the 1993 and 2008 Kenyan Demographic Health Surveys. The median number of sexual partners in 1993 increased rapidly to 10 partners reported at age 30 years then plateaued at this level. In 2008, the median number of sexual partners plateaued at around half the value of the 1993 plateau. The median number of lifetime sexual partners for men aged 20–54 years declined from 10 (IQR 4-20) in 1993 to 3 (IQR 2-7) in 2008 (P< 0·001). This decline could be due to a combination of the effects of AIDS mortality and a misreporting bias.