Moonika Aava (born 19 June 1979 in Rakvere) is a female javelin thrower from Estonia. Her personal best is 61.42 metres achieved on 2 August 2004, in her home country's capital Tallinn. This is the former Estonian record.
She practices athletics with the Pärnu SK Altius club under the supervision of Toomas Merila, her trainer. She won the national championships in 1995, 1996, 2000, 2001 and 2002.