Sierraia is a genus of freshwater snails with an operculum, aquatic prosobranch gastropod mollusks in the family Bithyniidae.

Species in the genus Sierraia include:

• Sierraia expansilabrum Brown, 1988 - vulnerable, from Sierra Leone
• Sierraia leonensis Connolly, 1929 - vulnerable, from Sierra Leone
• Sierraia outambensis Brown, 1988 - critically endangered, from Sierra Leone
• Sierraia whitei Brown, 1988 - least concern, from Sierra Leone

This genus occurs in Sierra Leone.

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