When did the last ice age occur?
Geologically speaking the earth is still in an ice age, as it has been for over 2 million years (The Pleistocene Glaciation). However, it is currenly in an interglacial, which is the name for the periodic receding of the glaciers back toward the poles. I think the question you really mean to ask is “When was the latest glaciation,” and that was from about 100,000 years ago until about 12,000 years ago, when the current interglacial started. About 18,000 years ago was the maximum extent of the latest glaciation.
