The distribution and use of long-lasting insecticidal net (LLIN) is one of the central interventions for preventing malaria infection. National policy aims to provide one LLIN for every sleeping space (approximately one net per 2 persons in malaria-endemic areas). But still there is inadequate follow-up of its utilization status. This study aimed to assess LLINs utilization and its' associated factors among households in Adama district, Oromia region, Ethiopia. A community-based crosssectional study was conducted. The study subjects were randomly selected 422 households by simple random sampling. Data was collected through interview and observation checklist. Among households who owned LLIN (96.7%), only 76% of household members had slept under LLIN during the previous night prior to interview. Regarding LLINs priority to household family members, only 65.4% households given priority to their children under five years and 50% for pregnant women. Concerning to the reasons for not utilizing LLIN, 52.4% of respondents said that sleeping under LLIN was not convenient and 23.1% of them were used for other purposes. Those households who are literate (AOR = 2.05, 95% CI =1.53-7.09), governmental employees (AOR=2.52, 95% CI=1.1-6.53), roof made up of corrugated iron sheet (AOR=1.90, 95% CI=1.79-4.6) were almost two times more likely to slept under LLIN during the previous night prior to interview. Despite high percentages LLIN ownership, there was still a gap between ownership and use of LLIN. Therefore Public health interventions should also address problems related to utilization status of LLIN.