Turtles' lifespans vary widely depending on the species, habitat, and care. Generally, turtles live 20 years or more, with many species commonly reaching 20 to 50 years in captivity. For example:

• Red-eared sliders live about 15–30 years.
• Painted turtles can live 25–50 years.
• Box turtles often live 20–50 years, with some reaching beyond 50 years.
• Some species like the spotted turtle may live over 100 years

Sea turtles are among the longest-lived turtles, with lifespans typically around 50 to 80 years, and some individuals reaching 100 years or more in the wild

. Tortoises, which are closely related but primarily terrestrial, tend to live even longer. Some tortoise species can live 100 years or more, with records of individuals surpassing 150 years. Examples include:

• Leopard tortoise and Greek tortoise: 100 years or more.
• Sulcata tortoise: 30–50 years, with some up to 120 years.
• Aldabra tortoise: 150+ years

Lifespan is strongly influenced by species, environmental conditions, and care quality. Proper veterinary care, diet, and habitat conditions can help turtles and tortoises live longer, especially in captivity where threats like predators are absent

. In summary, turtles typically live from 15 up to 50 years or more depending on species, while tortoises can live 70 to over 150 years, and sea turtles often live 50 to 80 years or beyond.