A covered wagon, also called a prairie wagon, whitetop, or prairie schooner, is a horse-drawn or ox-drawn wagon used for passengers or freight hauling. It has a canvas, tarpaulin, or waterproof sheet which is stretched over removable wooden bows (also called hoops or tilts) and lashed to the body of the wagon. They were a popular style of vehicle for overland migrations.

The Conestoga wagon was a heavy American wagon of English and German type from the late 18th century and into the 19th century. It was used for freight and drawn by teams of horses or oxen depending on load. The covered canvas top was supported on eight to twelve angled bows, rather than upright. Capacity was around 4 to 5 tons with no springs. Though it was boat-shaped it did not float. It was used in eastern North America for freight hauling, with some used for southward migration through the Appalachian valleys and along the Great Wagon Road. It was too heavy for use west of the Mississippi River; the westward wagons were lighter, and more angular or square.

With roots in the heavy Conestoga wagon developed for the rough, undeveloped roads and paths of the colonial East, the covered wagon spread west with American migration. Typical farm wagons were merely covered for westward expansion and heavily relied upon along such travel routes as the Great Wagon Road, Mormon Trail, Santa Fe Trail, and Oregon Trail, covered wagons carried settlers seeking land, gold, and new futures ever farther west.

Once breached, the moderate terrain and fertile land between the Appalachians and the Mississippi was rapidly settled. In the mid-nineteenth century thousands of Americans took a wide variety of farm wagons across the Great Plains from developed parts of the Midwest to places in the West such as California, Oregon, Utah, Colorado, and Montana. Overland migrants typically fitted any sturdy wagon with several wooden or metal bows which arched high over the bed. Over this was stretched canvas or similar sturdy cloth, creating the distinctive covered wagon silhouette.

For "overlanders" migrating westward, covered wagons were a more common mode of transportation than wheelbarrow, stagecoach, or train. Oxen were the most common draft animal for pulling covered wagons, although mules and horses were also used. Authors of guidebooks written for emigrants noted that oxen were more reliable, less expensive, and nearly as fast as other options.

Prairie schooner is a fanciful name for the covered wagon, drawing on their broad white canvas covers, romantically envisioned as the sails of a ship crossing the sea of prairie grass.

On all the prairie the white-covered wagon was the only sign of human life. It was visible as far as a sail would have been upon the lake, and the prairie, with its graceful undulations that had once been its bottom, waving now with grass, was not unlike the water's surface. A "prairie schooner" was what the settlers called such a wagon.

— William Eleazar Barton in The Prairie Schooner: A Story of the Black Hawk War