Dinosaurs · Large theropod

Albertosaurus

Say it al-BERT-oh-saw-russ. The name means ‘Alberta lizard’.

Albertosaurus beside a person 1.75 m tall. Ticks mark every metre.Body shape drawn for this site, showing the general build of large theropods

Length: 9 m
Weight: 1.5 tonnes
Diet: Meat-eaterprobably plant-eating dinosaurs
Walked: On 2 legs
When: Late Cretaceous76 to 74 million years ago
Fossils found in: Canada
Named by: Lamb (1914)
Family tree: Dinosauria › Saurischia › Theropoda › Tyrannosauroidea › Tyrannosauridae › Albertosaurinae

Where Albertosaurus sits in the age of dinosaurs.Periods from the ICS chart; dinosaur dates from the Natural History Museum

Large theropods. Big two-legged meat-eaters, such as Tyrannosaurus. See all 63

Lived at the same time

Centrosaurus · same country
Chasmosaurus · same country
Chirostenotes · same country
Corythosaurus · same country
Daspletosaurus · same country
Dromaeosaurus · same country
Edmontonia · same country
Edmontosaurus · same country

Other large theropods

Daspletosaurus Late Cretaceous
Abelisaurus Late Cretaceous
Dromiceiomimus Late Cretaceous
Ornithomimus Late Cretaceous
Tarbosaurus Late Cretaceous
Gorgosaurus Late Cretaceous
Rajasaurus Late Cretaceous
Alioramus Late Cretaceous

Source: Albertosaurus in the Natural History Museum Dino Directory, read 12 November 2026. Sizes are the museum's estimates for a typical adult. "Lived at the same time" lists dinosaurs whose dates overlap, which does not always mean they met.