Voluntary counselling and testing (VCT) for HIV allows individuals torndetermine their HIV status and serve as a gateway for both HIV preventionrnand early access to treatment, care and support. The services are available inrngovernment, non-government and health facilities. However, very little isrnknown about the demographic profile, risk behavior and HIV prevalencernamong VCT clients.rnThe study aims at describing the impacts of some pre-test counselling sessionrnfactors on the status of HIV/AIDS, which includes both demographic and riskrnbehavior factors. The data for this study were taken from the OSSA mobilernVCT center in urban Addis Ababa and data were analyzed using SPSS.rnAmong the 14810 clients a majority (67.6%) were males with overall averagernage of 28.8 years. About (62%) of the total clients were never-marriedrnfollowed by currently married clients (29.7%) among those whose marriagernwas dissolved (divorced and widowed). The proportion of female clients isrnhigher than males. About (57.1%) of the clients have attended junior andrnhigh school and female clients appeared to be less educated than males. Thernreason cited for seeking VCT services by the majority (49.4%) of the clients isrndue to the risky behavior they passed through followed by those who went to''rnplan for future" (44.7%). The vast majority of the clients (78.2%) ever hadrnsexual practices in the past and female clients were less likely than theirrnmale counterparts to report sexual practices. Nearly half of (52.2%) of thernclients reported that they did not use condoms in three months time prior torntesting and during the last sex months; females are more likely than malesrnfor not using condoms. Prevalence of HIV infection among mobile VCT clientsrnwas estimated to be 6.4% and varied by socio-demographic and risk behavior