Dill's aunt, Miss Rachel, lives in Maycomb, Alabama, in the neighborhood of the Finches; in fact, she lives next door. In Chapter One of To Kill a Mockingbird, Scout narrates her first meeting with Charles Baker Harris, who is called Dill:
Early one morning as we were beginning our day's play in the back yeard, Jem and I heard something next door in Miss Rachel Haverford's collard patch.
Thinking the noise emanates from the expectant rat terrier of Miss Rachel, they are surprised to see someone sitting and looking at them. Because he is so diminutive, Jem teases him immediately, saying that he looks "right puny" for a seven-year-old, but he is undaunted and teases Jem in return; then, he crawls under the fence in order to reach the other children, explaining that he is spending the summer at his aunt's house, and has come from Meridian, Mississippi.
Mrs. Dubose lives two doors to the north of the Finch House and the Radley Place is located three doors to the south. The place is called Maycomb in Alabama.