About 33 lumbricid species have become naturalized around the world,[1] but the bulk of the species are in the Holarctic region: from Canada (e.g. Bimastos lawrenceae on Vancouver Island) and the United States (e.g. Eisenoides carolinensis, Eisenoides lonnbergi and most Bimastos spp.)

Notably, a single mature individual of the species Prosellodrilus amplisetosus was found in a survey of soil biodiversity in Ireland.

Many of the species found in Finland are exhibiting similar increases in range[8] and Lumbricidae worms are also expanding into Northeastern Europe, starting from the near Baltic sea.

[9] A 2022 molecular phylogenetic study of the highly diverse Franco-Iberian genus Zophoscolex showed most of the Iberian species to form a distinct clade, formally described as Castellodrilus stat.

[3] Lumbricidae make up the majority of earthworms found in China, despite not being native to the area.

[12] Lumbricidae worms also tend to have a higher species richness than native North American worms, though the species richness of both the native and Lumbricidae decreases with increasing latitudes.

[13] Similar to North America, worms from the family were introduced to New Zealand and Australia by European settlers.