The study examined the association between the age of insecticide-treated nets (ITNs) in households and malaria parasite prevalence among children under five years old in Angola using 2011 malaria indicator survey data. Children from households that had owned ITNs for 2-6 months before the survey were significantly less likely to have malaria parasitemia compared to those from households without ITNs. ITNs that had been owned for one month or less, or for more than six months, were not protective. The findings provide information for assessing the impact of ITN interventions on reducing malaria burden in Angola, particularly when considering the age of nets in households.