Plexippus baro is a species of jumping spider in the genus Plexippus that lives in Ethiopia. The male was first described by Wanda Wesołowska and Beata Tomasiewicz in 2008. The female has not been identified. The spider is medium-sized with a cephalothorax that is typically 2.7 mm (0.11 in) long and an abdomen 3.6 mm (0.14 in) long. The carapace is brown with three white stripes, and the abdomen is russet-brown with a single white stripe. The spider has a pattern of two narrow white stripes on its clypeus which gives it a distinctive face. The copulatory organs distinguish it from related species, particularly the male's longer embolus.

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