Tropicosa is a genus of spiders in the family Lycosidae.

Distribution: Tropicosa occurs in South America, with its range extending from Colombia in the north through Peru and Brazil in the central regions to Paraguay, Uruguay, and Argentina in the south.

Etymology: The genus name is a combination of "tropic", referring to the neotropical distribution of its species, and the common wolf spider genus ending "-cosa".

Taxonomy: Three species were transferred to the newly erected genus from Lycosa, Alopecosa, and Schizocosa.

Species: , this genus includes four species:

• Tropicosa baguala Paredes-Munguia, Brescovit & Teixeira, 2023 – Brazil
• Tropicosa chelifasciata (Mello-Leitão, 1943) – Peru, Brazil
• Tropicosa moesta (Holmberg, 1876) – Peru, Brazil, Uruguay, Argentina
• Tropicosa thorelli (Keyserling, 1877) – Colombia, Peru, Brazil, Paraguay, Argentina