The Baklunish have skin of golden tones, and straight, fine-textured hair that is universally dark, ranging from dusky brown to bluish black. Their eyes are usually green or gray-green; hazel and gray eyes are rare. They tend to be long of limb and facial feature with high cheekbones. The bakluni are descendants of the human inhabitants of the ancient Baklunish Empire, and today are confined chiefly in the northwest Flanaess, in that region known as the Baklunish Basin and other nearby regions, including Zeif, Ekbir, Tusmit, Ull, Ket, the Dry Steppes, the Plains of the Paynims, the Tiger Nomads, and the Wolf Nomads. In some cases, the Baklunish mirror the real life Arabian people. Many similarities can be drawn between the two, including appearance and the influence of genies and other magical forces.

Pure Flan have bronze skin, varying from a light copper hue to a dark, deep brown. Flan eyes are usually dark brown, black, brown, or amber. Hair is wavy or curly and typically black or brown (or any shade in between). The Flan have broad, strong faces and sturdy builds. The Flan peoples were the first humans known to have settled the eastern portion of the continent of Oerik, the Flanaess, which is named for them. Regions of the Flanaess that contain a significant number of Flan peoples include Geoff, Sterich, the Rovers of the Barrens, Tenh, and the Wolf Nomads.

Oeridian skin ranges from tan to olive. Their hair ranges the whole spectrum from honey blond to black, although brown and reddish brown predominate. Eye coloration varies, but brown and gray are most common. Having once inhabited the plains of Central Oerik, they moved into what is now known as Ull starting 1,235 years ago; the Oeridians were driven eastward into the Flanaess by orcs and goblins used as mercenaries by the Baklunish Empire and the Suel Imperium. The Oeridians settled in much of the Flanaess, often conquering and assimilating the Flan natives and Suel settlers, though some lands, such as the Sheldomar Valley and Vale of Luna, were settled more peacefully. The Flanaess' most powerful modern empire, the Great Kingdom of Aerdy, was founded by a warlike Oeridian tribe known as the Aerdi. Other notable Oeridian tribes include the Vollar of modern Veluna and the Nyrondal of Nyrond."Unmixed" Oeridians are most commonly found in Furyondy, Perrenland, the Shield Lands, North Kingdom of Aerdy, the See of Medegia, Onnwal, and Sunndi.

The Olman have skin of a rich red-brown or dark brown color. Their hair is always straight and black, and their eyes are dark, from medium brown to nearly black. Olman have high cheekbones and high-bridges noses, a trait less strong in those of common birth. Some nobles still flatten the foreheads of their young, for high, sloping shape is considered beautiful. Their culture most closely resembles that of the Aztecs or Incans.

The Rhennee are not natives of Oerth, but rather immigrants from a land called Rhop on another world or plane of existence. Believed to have first arrived on Oerth in the Adri Forest, they were driven out by its hostile inhabitants and now inhabit the rivers and lakes of the Flanaess. The skin tones of the Rhennee range form olive to tan, their hair is usually curley and brown or black, with grey, blue, hazel and sometimes green eyes. The Rhennee are short and wiry but strong, men averaging 5 feet 6 inches and women shorter.

Purebred Suel typically have pale skin, with albinism being far more common than among other races. Violet and pale blue eyes are common, with gray and deep blue less common. Hair color is fair, from several shades of blond to light red, and is often kinky in texture. Suloise fashion favors solid colors, with parti-colored garments marking higher social station. Emblems, tokens, or similar affectations (typically in hues contrasting their clothes), often mark status or affiliation with ancient Suel houses and traditions. The ancient Suel often wore loose-fitting pantaloons covered by a baggy blouse, but their fashion has adapted to various climes in the centuries following the Great Migrations. The Suel began migrating to the Flanaess in large numbers circa -447 CY, from the Suel Imperium. The numbers of the Suloise Migration increased dramatically after the Invoked Devastation and the Rain of Colorless Fire in -422 CY. The Suel settled in many regions of the Flanaess, often competing with the native Flan and migrant Oeridians, as well as non-human inhabitants such as the elves and dwarves. Though people of Suel descent can be found nearly anywhere in the Flanaess, notable lands that contain a significant number of Suel include the Thillonrian Peninsula, the Scarlet Brotherhood, the Lordship of the Isles, the Sea Barons, the Sheldomar Valley, and the Urnst States. The Lendore Isles was once home to a large contingent of Suel, but most humans have been expelled from that land since the cult of Sehanine Moonbow gained control after the Greyhawk Wars.