How Long Do Leopard Geckos Live?
| Wild average | 6–8 years |
| Captive average | 15–20 years |
| Exceptional captive care | 25+ years |
| Oldest documented | ~28.5 years |
Captivity vs the wild
The gap between wild and captive lifespans is large. In the wild, predation, drought, and parasites keep most leopard geckos to around 6–8 years. In captivity, with predators removed and a consistent food supply, that same species routinely lives two to three times longer.
What actually drives lifespan
The biggest factors are consistent temperature gradients, correct calcium and D3 supplementation, a varied gut-loaded insect diet, low chronic stress, and prompt vet care when something looks wrong. Genetics and morph also play a role — some heavily line-bred morphs carry known health complications that can shorten lifespan.
Males vs females
Males tend to live somewhat longer on average than females, likely related to the physical toll of egg production in breeding females. This is a general tendency, not a fixed rule for any individual gecko.
The commitment this represents
A leopard gecko is a 15–20 year commitment in most cases — closer to adopting a small long-lived pet than a short-term one. That's worth weighing seriously before bringing one home.
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A single adult leopard gecko needs a 20-gallon long tank as an absolute minimum, with a 36x18 in (40-gallon breeder) footprint now considered the recommended standard — plus a secure lid, an under-tank heater on a thermostat, a thermal gradient, at least three hides, and a shallow water dish.
Set up in this order: substrate, then heat source wired through a thermostat, then hides and water dish, then decor — and run the whole enclosure for at least 24–48 hours to confirm stable temperatures before your gecko moves in.
Hatchlings can start in a 10-gallon tank or tub, juveniles do well in 20 gallons, and adults need a 20-gallon long as an absolute minimum — with 36x18 in (40-gallon breeder) now the widely recommended standard, not just an upgrade.
Heat a leopard gecko enclosure with an under-tank heater and/or overhead heat source (halogen or deep heat projector) wired through a thermostat — a thermostat is mandatory, not optional, and heat rocks should never be used.
Leopard geckos can survive without UVB using dietary D3 supplementation, but current husbandry guidance now recommends low-level UVB (roughly 2–6% T5) as best practice — it improves D3 synthesis, bone density, and natural behavior, and views on it have shifted significantly from older nocturnal-species advice.
Keep ambient humidity around 30–40% across most of the enclosure, with a dedicated humid hide raised to roughly 70–80% to support smooth, complete sheds.