Emma Karolin Rienas (born 15 October 1982) is a retired Swedish sprinter.^[1] She represented her country in the 4 × 100 meters relay at the 2005 World Championships. Additionally, she finished sixth in the same event at the 2010 European Championships.

Outdoor

• 100 metres – 11.54 (+1.8 m/s, Sundsvall 2009)
• 200 metres – 24.00 (0.0 m/s, Sollentuna 2006)

Indoor

• 60 metres – 7.32 (Turin 2009)
• 200 metres – 25.18 (Malmö 2005)