Nothobranchius milvertzi is a species of seasonal killifish in the family Nothobranchiidae. This species is endemic to northern Zambia. It is known only from the area of the type locality - ephemeral pools formed on the floodplain and in the seasonal riverbeds of the Lushiba Marsh in the Lake Mweru basin, Luapula Province, northern Zambia.
The fish is named in honor of Finn Christian Milvertz.