Updated 19 October 2026
An adult leopard gecko needs an enclosure of at least 36 x 18 x 18 inches, about 40 gallons, and bigger is better. Floor space matters more than height, because leopard geckos live on the ground. A front-opening glass terrarium such as the Exo Terra 36 x 18 x 18 is the easiest choice for most keepers. A 40 gallon breeder tank is the budget option, and a 4 x 2 x 2 foot PVC enclosure is the upgrade if you have the room. Old advice that a 10 or 20 gallon tank is enough is out of date.
Below are our tank picks, a size chart, how glass, PVC and wooden enclosures compare, and how to set up the habitat inside.
Best leopard gecko tanks at a glance
| Pick | Size | Why we like it | Where to buy |
|---|---|---|---|
| Best overall: Exo Terra glass terrarium | 36 x 18 x 18 in | Front-opening locking doors, a screen top for lights and a raised base so a heat mat fits underneath | Check price on Amazon |
| Best value: REPTI ZOO glass terrarium | 36 x 18 x 18 in | The same front-opening layout as the Exo Terra for less money | Check price on Amazon |
| Best upgrade: PVC enclosure | 48 x 24 x 24 in (4 x 2 x 2 ft) | Holds heat and humidity better than glass, lighter, and gives your gecko twice the floor space | Check price on Amazon |
| Budget pick: 40 gallon breeder tank | 36 x 18 x 16 in | The cheapest way to meet the minimum size. Opens from the top, so add a locking screen lid | Check price on Amazon |
What size tank does a leopard gecko need?
One adult needs at least 36 x 18 x 18 inches (90 x 45 x 45 cm). That is the size ReptiFiles and most current care guides give as the minimum. It is enough room for a warm side and a cool side, three hides and space to explore. Leopard geckos are more active than people expect, and they use extra room when they have it.
| Tank | Dimensions | Verdict |
|---|---|---|
| 10 gallon | 20 x 10 x 12 in | Too small for any leopard gecko. There is no room for a proper heat gradient |
| 20 gallon long | 30 x 12 x 12 in | The old minimum. Cramped for an adult and not recommended |
| 40 gallon breeder | 36 x 18 x 16 in | Meets the minimum for one adult |
| 36 x 18 x 18 terrarium | 36 x 18 x 18 in | The recommended starting size for one adult |
| 4 x 2 x 2 enclosure (about 120 gallons) | 48 x 24 x 24 in | Ideal. Room for a full bioactive setup |
Babies and juveniles can go straight into an adult-size enclosure. Fill it with plenty of hides, plants and clutter so a small gecko feels safe and can find its food. That saves buying a second tank a few months later.
Height matters less than floor space, but 18 inches or more lets you add a deep substrate layer, branches and rocks to climb. Leopard geckos do climb low branches and rocks when they have them.
Glass, PVC or wooden vivarium?
| Material | Good | Not so good |
|---|---|---|
| Glass terrarium | Easy to see into and clean, widely available, works with a heat mat underneath | Heavy, loses heat through the glass, and a small gecko can feel exposed with clear sides all round |
| PVC enclosure | Light, strong, holds heat well, opaque sides help geckos feel secure | Costs more. Heat comes from overhead lamps because you can't use a mat underneath |
| Wooden vivarium | Cheap and holds heat well. Common in the UK | Wood absorbs moisture and is hard to disinfect unless it is sealed, so it suits dry setups only |
For most first-time keepers a glass terrarium is the easiest start. If you can stretch the budget or want a bigger enclosure, PVC is the better long-term home.
Front-opening or top-opening?
Front-opening doors are better. Reaching in from above looks like a predator swooping down, which stresses a new gecko and makes taming harder. Front doors also make cleaning and feeding easier. If you buy a top-opening tank, use a locking screen lid, because leopard geckos can push a loose lid up.
Ventilation
Leopard geckos need a dry enclosure with good airflow. A full screen top, or a screen top plus front vents as on most terrariums, is enough. Avoid fully sealed boxes and solid lids.
Where do leopard geckos live in the wild?
Wild leopard geckos live in dry, rocky grassland and scrubland in Afghanistan, Pakistan, north-west India, Iran and nearby countries. The ground is hard-packed soil and gravel, not soft sand dunes. The summers are hot and the winters are cold. In the day they shelter under rocks and in burrows where it is cooler and more humid, and they come out to hunt insects at dusk and dawn.
A good habitat copies this: a firm soil-based floor, plenty of rocky hides, a warm daytime spot, cooler nights, and a humid hide that copies the damp burrows they shelter in.
How to set up a leopard gecko habitat
- Pick a spot. Out of direct sunlight, away from radiators and draughts, on furniture that can take the weight.
- Add the substrate. A soil and sand mix such as Zoo Med Excavator clay, or a soil-based bioactive mix, 2 to 4 inches deep. Paper towel or tile is fine for quarantine. Avoid calcium sand and walnut shell. See our substrate guide.
- Set up the heat on one side. Aim for a warm spot of about 90 to 95°F on the floor, a cool side of 70 to 77°F, and no lower than about 60°F at night. Use an overhead halogen bulb or a heat mat, always on a thermostat.
- Add lighting. 12 to 14 hours of light a day, with a low-strength UVB tube such as the Arcadia ShadeDweller. Turn all lights off at night. No red or blue night bulbs. Our lighting guide has more detail.
- Place three hides. One on the warm side, one on the cool side, and a humid hide with damp moss for shedding. Reptile caves or cork bark work well.
- Add decor and a water dish. Flat rocks, low branches and plants to climb and hide behind, plus a shallow water dish.
- Check the numbers before your gecko arrives. Run everything for a day or two and check the warm spot with an infrared temperature gun, and the air with a digital thermometer and hygrometer. Ambient humidity should sit around 30 to 40%.
Need everything in one list? Our starter kit and supplies checklist covers every item with a pick for each.
Habitat mistakes to avoid
| Mistake | Why it's a problem | Do this instead |
|---|---|---|
| A 10 or 20 gallon tank | Not enough room for a heat gradient or three hides | 36 x 18 x 18 in or bigger |
| Heat with no thermostat | Heat mats and bulbs can overheat and burn | Every heat source on a thermostat |
| Heat rocks | Known to cause serious belly burns | An overhead bulb or a mat under the tank |
| Calcium sand | Geckos lick it for the calcium, which can cause impaction | A soil and sand mix, or tile |
| Red or blue night bulbs | Geckos can see the light, and it disturbs their sleep | Lights off at night; a mat or ceramic heater if the room gets cold |
| Two males together | Males fight, often badly | One gecko per enclosure |
Can leopard geckos live together?
It's best to keep one leopard gecko per enclosure. They are solitary in the wild and don't get lonely. Two males will fight. A male and female will breed constantly, which wears the female out. Even two females can stress each other or compete for food and the warm spot. If you want more than one gecko, give each its own enclosure.
Frequently asked questions
What size tank does a leopard gecko need?
At least 36 x 18 x 18 inches, about 40 gallons, for one adult. A 4 x 2 x 2 foot enclosure is ideal.
Can a leopard gecko live in a 10 gallon tank?
No. A 10 gallon tank is too small even for a baby to have a proper warm and cool side. Start a baby in an adult-size enclosure with plenty of hides.
Is a 20 gallon tank big enough for a leopard gecko?
A 20 gallon long was the old minimum, but current guidance says it is too small for an adult. A 40 gallon breeder tank costs a little more and meets the minimum.
Is a 40 gallon tank good for a leopard gecko?
Yes. A 40 gallon breeder tank (36 x 18 x 16 inches) meets the minimum for one adult and is the cheapest way to get there. Add a locking screen lid, as it opens from the top. A 36 x 18 x 18 front-opening terrarium is a little easier to use.
Do leopard geckos need a tall tank?
No. Floor space matters most because they live on the ground. Around 18 inches of height is enough for deep substrate and some low climbing.
Is a glass or PVC enclosure better for a leopard gecko?
Both work. Glass is cheaper and easy to find. PVC holds heat better, is lighter and its solid sides help a gecko feel secure, but it costs more.
How hot should a leopard gecko tank be?
About 90 to 95°F at the warm spot, 70 to 77°F on the cool side, and no lower than about 60°F at night.
Where do leopard geckos live in the wild?
In dry, rocky grassland and scrub in Afghanistan, Pakistan, north-west India and Iran. They shelter in burrows and under rocks in the day and hunt at dusk and dawn.
Next, read our leopard gecko care sheet for feeding, handling and health.