Madeleine L'Engle has published more than fifty books, including twenty-three novels, virtually all of them interconnected by recurring characters and locales. In particular, L'Engle's three major series have a consistent geography, including a number of significant fictional locations. These generally fall into two categories: Major fictional locations in L'Engle's novels include the following places, grouped by the series in which they appear.

Time Quartet

On Earth

Other planets

When Meg, Calvin and Charles Wallace travel to other planets, the ones whose names are given include the following: They also stop briefly on an unnamed two-dimensional planet and on an unnamed planet in Orion's belt, the latter of which is the home of the Happy Medium.

Other places

Two places visited by Meg and Calvin in A Wind in the Door do not fit neatly into either of the above two categories.

Polly O'Keefe series

As newlyweds, Calvin O'Keefe and his wife Meg live in an apartment near the unnamed hospital where Calvin works. By the time of The Arm of the Starfish, about twelve to thirteen years later, the family has settled on the first of two fictional islands. Calvin, Charles and Polly also travel to other places in some of the novels.

Austin family series

Other significant places

In addition to the many fictional locations, L'Engle has set parts of her novels in a number of real places, including the following: