the fastest snake in the world is the black mamba (Dendroaspis polylepis). The black mamba is an incredibly swift and agile snake found in parts of sub-Saharan Africa. It can reach speeds of up to 12.5 miles per hour (20 kilometers per hour) on the ground, making it one of the fastest snakes and land animals in the world. It's important to note that scientific discoveries and research may have occurred , so it's always a good idea to verify with more recent sources for the most up-to-date information.