Andrus Värnik (born 27 September 1977) is a retired Estonian track and field athlete who competed in the javelin throw.

His personal best throw of 87.83 m, set in 2003, was the Estonian record for 15 years.

Värnik won his first international medal, a silver medal, in the 2003 World Championships in Athletics, throwing 85.17 m. The next year he finished sixth in the javelin contest at the Olympic Games with the result 83.25 m. With 87.17 m he won a surprise gold medal at the 2005 World Championships in Athletics, ahead of Olympic champion Andreas Thorkildsen, defending World Champion Sergey Makarov and home favorite Tero Pitkämäki.

In 2007, Värnik participated as a celebrity contestant on the second season of Tantsud tähtedega, an Estonian version of Strictly Come Dancing.

On 16 January 2010, Värnik was caught drunk driving in Tallinn.