Thedas is a continent in the southern hemisphere, and the only known continent of the Dragon Age universe, upon which all of the Dragon Age games are set. Not much is known about the lands that lie beyond Thedas. It is presumed that there are other continents, as the Qunari do not originally come from Thedas but from an unknown land across the Boeric Ocean. According to some sources, humans also came from the north.
The word "Thedas" originates from Tevene, once referring to all lands beyond the Imperium, it eventually came to encompass the entire continent. A native of Thedas is referred to as a Thedosian.
- Anderfels – a kingdom in northwestern Thedas
- Antiva – a kingdom in eastern Thedas
- Elvhenan – the ancient elven kingdom
- Estwatch – an island stronghold
- Ferelden – a kingdom in southeastern Thedas
- Free Marches – a confederation of city-states in eastern Thedas
- Nevarra – a kingdom in central Thedas
- Orlais – an empire in southwestern Thedas
- Par Vollen – an island in northeastern Thedas controlled by the Qunari
- Rivain – a kingdom in northeastern Thedas
- Seheron – an island in northern Thedas
- Tevinter Imperium – a nation in northern Thedas
Oceans and seas
- Amaranthine Ocean – in the east
- Boeric Ocean – in the north, surrounding Par Vollen and the Seheron archipelago
- Buried Sea – located in the Uncharted Abyss beneath the Deep Roads accessible via the Bastion of the Pure
- Colean Sea – between the Anderfels and Seheron
- The Frozen Seas – southeast of Ferelden
- Nocen Sea – north of the Tevinter Imperium, including the Ventosus Straits
- Sundered Sea – on the southwestern edge of Orlais
- Venefication Sea – between Rivain and Par Vollen, including the Northern Passage leading to the Amaranthine Ocean
- Volca Sea – west of the Anderfels
- Waking Sea – between Ferelden, Orlais, and the Free Marches
- Shining Sea – western part of the Waking Sea[note]
- Lake Calenhad – in Ferelden, also the largest in Thedas
- Lake Celestine – in the Heartlands of Orlais
- Lago di Novo – in Antiva
- Lake Luthias – a small lake south of Lake Calenhad
- The Sulfur Lakes – south of Orlais
- Main article: Rivers
- Arl Dumat – a volcano between the Hunterhorn Mountains and Gamordan Peaks
- Belenas – said to be the mountain that lies at the center of the world; Avvar legend says that it was destroyed in the battle between Korth the Mountain-Father and the serpent Nathramar; the Lady of the Skies' tears filled the crater left behind to form Lake Calenhad
- Mount Daverus
- Dragon's Peak – an extinct volcano located near Denerim
- Frostback Mountains – separating Ferelden from Orlais
- Gamordan Peaks – in southwestern Orlais
- Hunterhorn Mountains – in western Orlais and between Orlais and the Anderfels
- Vimmark Mountains – in the southern Free Marches
- The White Spire – in Antiva
- Unnamed mountain range in eastern Tevinter
- Unnamed mountain range in eastern Rivain
- Arbor Wilds – in southern Orlais
- Arlathan Forest – in the Tevinter Imperium's far east
- Brecilian Forest – in eastern Ferelden
- The Donarks – a jungle north of the Anderfels
- Korcari Wilds – in southern Ferelden
- Planasene Forest – in the southwestern Free Marches
- The Tirashan – western edge of Orlais
- Wending Wood - in northeastern Ferelden, near Amaranthine
There are numerous underground locations scattered across Thedas. A vast majority of these underground passageways, cavern systems, and tombs can be accessed through active and abandoned mines, former Warden Keeps, disregarded fortresses, forgotten elven ruins, vast chasms, embankment openings, ancient Tevinter ruins, lost dwarven thaigs and Deep Roads entrances.
The Deep Roads span the length and breadth of Thedas which connect the countless thaigs of the dwarven empire. However after the empire's decline the last four major kingdoms of the dwarves are the following, though only two are still inhabited:
- Gundaar (lost)
- Hormak (lost)
- Kal-Sharok – located deep beneath the Hunterhorn Mountains (inhabited)
- Orzammar – located beneath the Frostback Mountains (inhabited)
- Kal'Hirol – located beneath the Arling of Amaranthine (reclaimed in 9:31)
Substructures are not as deep below ground and can be accessed through various engineered structures, foundations, conduits and habitations. These locations are commonly known as retreats, undercrofts, basements, cellars, vaults, bunkers and sewer passageways.
Few details are available concerning the lands that lie beyond the boundaries of Thedas.
- Beyond the Korcari Wilds and Arbor Wilds to the south there is a frozen wasteland called the Sunless Lands. These lands are covered in snow for most of the year. Despite the inhospitality of the Sunless Lands, they are inhabited by people who are called "Agadi" by the Chasind, which means "exile" in their language. Genitivi theorizes that the Agadi have been expelled from the Korcari Wilds and splintered off into their own culture.
- There is land to the west of Thedas, although the Hunterhorn Mountains inhibit travel, as do the jungles of the Donarks in the northwest. The Tevinter call these lands the 'Viridis' - "The Green," and have rumors of wingless dragons and flying chimeras inhabiting the jungles.
- The idea for the Joining came from the people of the Donarks. According to most records, Nakiri of the Donarks was the one who first suggested imbibing the blood of the darkspawn, as his people were known to consume the blood of their enemies to absorb their power.
- Until the early Black Age, the Ander city of Laysh traded with ships that came across the Volca Sea. The travelers who according to Ander legend are named 'Voshai', had an excessive interest in lyrium. All Voshai ships were captained by dwarves, while no elves were ever reported. Tevinter expeditions to reach the homeland of the Voshai had failed with no ship ever coming back. In recent times, however, rumors have risen that the Voshai ships have returned, bringing with them tales of a 'massive cataclysm'.
- There are numerous islands in the Boeric Ocean. Some are havens for pirates, others are colonies of Tevinter or the Qunari, but others have indigenous populations. The most famous of these is the near-mythical Par Ladi. The Parladians are rumored to have the best coastal defenses in Thedas, practice arts similar to the Rivaini seeresses and to be bedecked in gold and jewels.
- The Qunari originate from a land far to the east, beyond the Boeric Ocean. They arrived to Thedas from the north.
- The Executors claim to act "on behalf of powers across the sea," presumably entities which reside in lands beyond the Amaranthine and Boeric Oceans.
- The land beyond the Amaranthine Ocean is referred to in myths as 'Amaranth.' Amaranth is said to be devoid of any sentient species and all Thedosian attempts of colonization have failed. Legends tell that later expeditions found former settlements empty and that the only survivor was driven mad by something and killed himself a short time after being discovered.
- Alamarri leader Hafter left his homeland and sailed east into the unknown fringes of the Amaranthine Ocean. He was never heard from again.
- Karolis, a famous bounty hunter, owned an axe that reportedly came from across the eastern ocean.
- Thedas has two moons, the secondary moon being named Satina (from whence the holiday of Satinalia gets its name).
- According to David Gaider, there is no individual name for the planet where Thedas exists, as most Thedosians consider Thedas "the entire world".
- Time-telling in Thedas is usually inexact, as most people do not own any time-measuring devices. Dwarven clocks are thus uncommon but notable.
- The Shining Sea was first mentioned in one of the epilogues for Dragon Age: Origins. At the time, it wasn't featured on any of the maps. When asked for clarification, David Gaider said it's likely a mistake stemming changes made during development. However, the Shining Sea later appeared on the official map included in Dragon Age: Tevinter Nights.
- The name "Thedas" is an acronym. It stands for "THE" "D"ragon "A"ge "S"etting. 
- Drugs and alcohol
- Fauna and flora
- Funerary rites
- Games and recreation
- History of Blights in Thedas
- Sexuality and marriage