Crocidura nimbae has been recorded from undisturbed lowland tropical moist forest at around 500 m asl (Taï forest), to submontane habitats at the foot of Mount Nimba. This species appears to be associated with hills or small mountains. In the Ziama biosphere reserve in Guinea it was found in primary and secondary forests and older restoration sites (Nicolas et al. 2009).

This lowland to submontane West African species has been recorded from Sierra Leone, Liberia, Guinea and Côte d'Ivoire. Localities that it has been reported from include Mount Nimba (Côte d'Ivoire, Guinea and Liberia), Panguma in Sierra Leone and from Taï National Park in Côte d'Ivoire. However, its presence on Mount Nimba (Jacquet et al. 2012, Denys et al. 2021), or within Banco National Park in Côte d'Ivoire (Kadjo et al. 2013), could not be verified in recent surveys.

It has been recorded from the undisturbed core area of Taï National Park in Côte d'Ivoire. Reinforcement of protection in Taï park reduced the rate of encroachment and allowed for forest regeneration (Chatelain et al. 2010). However, there is a need to maintain remaining areas of suitable forest for this species throughout its range. Additional surveys are needed to identify any other viable populations. Secondary restoration sites within Sierra Leone, Liberia, Guinea and Côte d'Ivoire, should be assessed for their conservation value (Nicolas et al. 2009).