Erki Nool (born June 25, 1970) is an Estonian decathlete and winner of the gold medal for Decathlon in the 2000 Summer Olympics in Sydney. Though Nool did not place first in any individual event, his total score was the highest.

He only won the title after an appeal earlier in the day when the referee over ruled his field judges and ruled out Erki's discus throw of 43.66 metres. The appeal was successful and the Estonian took gold ahead of the Czech, Roman Šebrle and American Chris Huffins .