Inna Poluškina (born 7 July 1984, in Riga) is a Latvian long-distance runner who specialises in the 3000 metres.
Poluškina has won championships in the 1500 m, 3000 m, 5000 m, 10,000 m and half marathon categories.
In 2008, she set Latvian record in 3000 m steeplechase and did Olympic B normative.