Thatiana Regina Ignácio

Thatiana Regina Ignácio (born 2 July 1983) is a retired Brazilian athlete who specialised in the sprinting events. She competed with her teammates in the 4 × 100 metres relay at the 2005 and 2007 World Championships finishing fifth on the first occasion. She won multiple medals at the regional level.

She has personal bests of 11.45 seconds in the 100 metres (2007) and 23.92 seconds in the 200 metres (2005).