What is the tallest roller coaster in 2011?

As of 2011, Kingda Ka at Six Flags Great Adventure in New Jersey, United States held the distinction of being the tallest rollercoaster in the world. It stands at an imposing height of 456 feet (139 meters).

Please note that the information regarding world records in 2011 might be outdated as there may have been newer roller coasters built after 2011 that challenge this record. To stay up to date with the latest height of roller coaster rankings, please refer to credible current sources to get the most up-to-date information.