In 2019, a nationwide measles/rubella vaccination campaign was organized in Cameroon. However, in 2022, 67 districts reported measles outbreaks. The West region (WR) reported outbreaks in seven districts among which four border the Northwest region (NWR). Since 2016, an armed conflict in the NWR and Southwest region has caused massive influx of people into the WR. Population displacement negatively affects routine immunization and favors outbreaks. We therefore aimed to determine factors associated with measles outbreaks in the WR of Cameroon.