Reindeer, also known as caribou, are not currently endangered. However, some populations of reindeer have faced declines in recent years due to habitat loss and over-hunting. There are estimated to be around 5 million reindeer in the world today, with the majority living in the Arctic regions of North America, Europe, and Asia. While their populations are still healthy, it is important to continue monitoring their numbers and protecting their habitat to ensure their long-term survival.