Eldar Rønning (born 11 June 1982 in Levanger Municipality) is a Norwegian former cross-country skier.

In 2004/05, he achieved three podium finishes in World Cup Sprint events, including a win at Reit im Winkl.

His best World Cup result was a third place achieved in a classic sprint in Drammen, a race in which the top four were Norwegian, and was won again by Svartedal.

Rønning finished the season in 11th place in the FIS World Cup overall standings, 474 points behind German Tobias Angerer.

Rønning has earned six medals at the FIS Nordic World Ski Championships with four golds (4 × 10 km relay 2007, 2009, 2011, 2013), one silver (15 km classical 2011) and a bronze (classical sprint 2007).