Slavko Vraneš (Serbian Cyrillic: Славко Вранеш, pronounced [slǎːvkɔ̝ vrâne̞ːʃ]; born 30 January 1983) is a Montenegrin former professional basketball player. Standing at 2.29 m (7 ft 6 in), he was one of the tallest players in the world. While he only played one game in the National Basketball Association (NBA) in his career, a 2004 regular season game for the Portland Trail Blazers, he went on to have a successful career in Europe, winning the 2011 EuroCup with UNICS Kazan. Internationally, Vraneš represented the Montenegrin national team.

Vraneš started playing basketball in the Serbian club FMP Železnik. Still a junior, he was snapped up by the Turkish club Efes Pilsen for the 2000–01 season. Then he returned to his native country in January 2001, where he played for Budućnost Podgorica until the summer of 2003.

Vraneš was selected by the National Basketball Association's New York Knicks in the second round of the 2003 NBA draft. He was waived by the Knicks in December 2003 before ever playing a game for them.

In early January 2004, he signed a ten-day contract with Portland Trail Blazers. Before his contract with Portland expired, he played one game on January 8, which became Vraneš's only career NBA game. The game was a 75–96 loss to the Minnesota Timberwolves, where Vraneš played for three minutes and recorded one foul and one missed field goal..

After that, he played briefly for Crvena zvezda. From 2004 to 2007, he played with Budućnost Podgorica for the second time in his career. In October 2007, he signed a three-year contract with Partizan.

In October 2011, he signed with Sanaye Petroshimi BC in the Iranian Super League. During 2013, he played with Metalac Valjevo. In October 2013 he signed with Zob Ahan Isfahan.

On February 10, 2015, he re-signed with Metalac Valjevo. On May 8, he left Metalac Valjevo. Later that month, he returned to his former team Petrochimi Bandar Imam of Iran.

In November 2017, he signed with Metalac Valjevo.