The Suikoden series is set in a world with many countries. The political geography has changed over the series chronology; while the most recent game in the setting is Suikoden V, chronologically, Suikoden IV is the earliest game while Suikoden III occurs latest within the time span of the series.
Suikoden, Suikoden II and Suikoden III are set on the Northern Continent, a land mass composed of several regions. Suikoden takes place in the Scarlet Moon Empire, which is located on southeastern coast of the Northern Continent, and is composed primarily of the Toran region, with Lake Toran at its centre. Notable locations in this area include Gregminister, the empire's capital situated in Arlus, the Warrior's Village in the Lorimar region, and the Great Forest. At the end of Suikoden, the empire is replaced by the Toran Republic.
Suikoden II is set in the Dunan region, directly north of the Toran Republic, and initially comprises the Highland Kingdom in the east and the City-States of Jowston, a confederation of politically autonomous states, in the west. Significant locations in Jowston include the cities-states of South Window, Greenhill, Muse, and Two River, and the Knightdom of Matilda. Following the Dunan Unification War, the Highland Kingdom falls and it, along with the Jowston City-States unite to form the Dunan Republic. The Tinto region lying in the west, separated from Dunan by mountains, chooses to remain politically independent and becomes the Tinto Republic.
Sharing Dunan's western border and north of Tinto are the Grasslands, which stretch from the centre of the Northern Continent to a small portion of the continent's west coast. The area is composed of the six clans: the Lizard, Duck, Karaya , Chisha, Safir, and the Alma Kinan. Directly west of the Grasslands and bordered in the east by Tinto is the Zexen Confederacy, located on the west coast of the Northern Continent and historically an offshoot of the Grasslands. Important locations include the Zexen capital Vinay del Zexay and Budehuc Castle, which lies close to the Grasslands border in northwest Zexen. The primary conflict of Suikoden III occurs in these areas. The northwestern portion of the continent, due north of the Grasslands and Zexen, is the Knightdom of Camaro and the surrounding Nameless Lands.
The largest country in the north is the Holy Kingdom of Harmonia, located in the northeastern portion of the continent. Since its establishment, it has assimilated various neighbouring countries, such as Sanadia, as well as a portion of the Grasslands - the Kanaa clan of the Grasslands became Le Buque under Harmonian rule after the First Fire Bringer War. Notably, the Scarlet Moon Empire originally formed after obtaining political autonomy from Harmonia and taking Harmonia's old capital as its own, renaming it Gregminister, resulting in Harmonia establishing a new capital at the Crystal Valley. Harmonia is also home to the Tower, a location reserved for training and housing members of the Howling Voice Guild.
Other major areas on the Northern Continent include the Kooluk region and Kanakan. The Kooluk region was originally the Kooluk Empire during the course of Suikoden IV and eventually dissolved in Suikoden Tactics to be left as a group of independent settlements. It takes up most of the southern edge of the Northern continent and directly borders the Toran Republic in the east and the Dunan Republic in the north. Off the eastern coast of Toran is the island of Kanakan.
Lying directly south of the Northern Continent is the ocean and several islands, including Obel, Middleport, and Razril. At the end of Suikoden IV, most of these islands are unified to become the Island Nations Federation. The largest island in the area, the Dukedom of Gaien, remains independent. West of Gaien is the island nation of the Kingdom of Zelant.
Due south of the Island Nations is the Southern Continent, a landmass composed primarily of three countries: the Queendom of Falena, and its neighbours, the theocracy of Nagarea in the southwest and the New Armes Kingdom in the southeast. As the setting for Suikoden V, Falena has a large network of rivers and lakes throughout the country and the Ashtwal Mountains in its northern region. Key locations include the cities of Stormfist and Doraat in the west; Rainwall, Estrise, and Sable, located on the Armes border, in the east; Lelcar, Lordlake, and Sauronix in the south; and the Falenan capital, Sol-Falena, and the holy land of Lunas, governed by the Oracle, in the north. Falena has been protected from Nagarea since the mountain pass between the nations was destroyed, though Armes continues to remain a threat throughout Suikoden V.
Northeast of Falena also appears portion of a landmass of considerable size. West of the Northern and Southern Continents and the Island Nations is a landmass referred to as the Western Continent, of which few details are known. Scattered across the world are mysterious ruins attributed to the lost Sindar race, which is a recurring theme throughout the Suikoden series.