Earth

Earth was a world on an alternate Material Plane.

People
In the Year of the Prince, 1357 DR, an inhabitant of Earth called Ed of the Greenwood assembled various journals, maps, and other works from Elminster Aumar into the first publication of the Forgotten Realms campaign setting.

Laeral Silverhand also traveled to Earth to visit Steven E. Schend.

The Mulan were thought to originally have come from Earth.

Locations
The Pecos River was a river on Earth. St. Sollars the Twice-Martyred described the demon lord Orcus, Prince of the Undead, as "the meanest dude this side o' the Pecos".