Flannery O'Connor wrote at Andalusia, her family's dairy farm just outside Milledgeville, Georgia. Her workspace was a bedroom on the ground floor, and she set her desk to face the back of a wooden wardrobe so there was nothing to look at but the page.

The Direct Answer
At Andalusia, her Georgia farm, at a desk facing the back of a wardrobe.
She wrote in a downstairs bedroom, her back to the window, her typewriter aimed at a blank wooden surface.

The Farm at Andalusia

After lupus forced her home from the North in 1951, O'Connor lived with her mother, Regina, at Andalusia, a working dairy farm a few miles outside Milledgeville. She stayed there until her death in 1964. The farm gave her the peacocks she loved and the Georgia voices that fill her stories, plus a quiet that suited a body that tired fast. When crutches made the stairs impractical, she moved into a bedroom off the front hall on the ground floor, and that room became her studio.

Andalusia wasn't chosen for the scenery. It was her mother Regina's working dairy, and O'Connor landed there because she had nowhere else to be. What could have felt like exile turned into the material instead. The people around the farm and the country roads past it walked more or less straight into the fiction, sharpened but still recognizable.

The setup was practical before it was anything else. The desk sat where she could reach it easily from the bed, and the door to her mother's adjoining room stayed out of her sightline while she worked. She composed at a manual typewriter, revising at the machine rather than in longhand, with a small shelf of books close at hand. Andalusia is a museum now, and visitors can still see the modest bedroom, the typewriter, and the crutches leaning nearby.

A Desk Facing a Blank Wall

The detail people remember is where she pointed the desk. O'Connor set her typewriter so that she faced the back of her wardrobe, with her back to the window. Peacocks and other animals wandered the yard outside, and she wanted none of it in view while she worked. What she looked at, for three hours a morning, was the plain wooden back of a piece of furniture. There was nothing to reward a wandering eye, only the work in front of her.

That blankness fits everything else about how she worked. Fixed hours and a fixed spot, with no distraction built into the room. She talked about needing that sameness when she gave advice to other writers:

I write only about two hours every day because that's all the energy I have, but I don't let anything interfere with those two hours, at the same time and the same place.

Flannery O'Connor, Mystery and Manners

For how those fixed hours filled the rest of her day, see the full Flannery O'Connor writing routine.

What You Can Steal