Julio Nalundasan (July 21, 1894 – September 20, 1935) was a Filipino lawyer and politician who was one of the political rivals of Ilocos Norte politician Mariano Marcos, the father of Ferdinand Marcos (who later became the tenth President of the Philippines). Nalundasan was first elected as representative of the second district of Ilocos Norte in 1934, beating Mariano Marcos. They competed again in 1935, this time for assemblyman, and he was re-elected. He was killed by a sniper at his home on September 20, 1935, just two days after being proclaimed the winner. Marcos's son, Ferdinand, and brother-in-law, Quirino Lizardo, were later convicted for the murder. However, the conviction was overturned by the Supreme Court of the Philippines, through a decision by then-Associate Justice Jose P. Laurel.