Narnian Empire

See here if you are looking for the individual country of Narnia or the Kingdom of Narnia

The Narnian Empire was the greatest monarchical political state in the World of Narnia, comprising many territories, centering around one head nation: the Kingdom of Narnia.

The Empire
The Narnian Empire spread its authority over all of the following territories:
 * The Kingdom of Narnia (est. Narnian-year 1):
 * The Lantern Waste
 * The Western March
 * Cair Paravel
 * The Marshlands
 * Ettinsmoor (incorporated in 2304, after it failed as an independent nation established in 1014)
 * Overseas territories:
 * The Lone Islands (Avra, Doorn, and Felimath) (302)
 * Telmar (c. 1998)
 * Islands discovered during the voyage of the Dawn Treader, but are not confirmed as being part of the Narnian Empire or not:
 * Dragon Island
 * Burnt Island
 * Deathwater Island (forbidden)
 * Dark Island
 * Unofficial territories:
 * Merpeople Nation (sometime after King Gale)
 * The Gorge Path of the Western Wild (2303)
 * Underland (after the death of the Lady of the Green Kirtle in 2356)

Trivia
The ruler of the Narnian Empire was specifically entitled the Emperor or Empress of the Narnian Empire, not to be confused with the title of the leader of the individual Kingdom of Narnia who was entitled the King or Queen of Narnia. However, the titles often coincide. The only notable exception is the Golden Age, during which High King Peter of Narnia was the Emperor of the Narnian Empire, while his co-rulers Susan, Edmund, and Lucy were simply King and Queens of Narnia.