Do snakes have bones is one of the most common questions about these animals, and the answer is a firm yes — snakes are vertebrates with a full bony skeleton. The myth that they are soft, boneless, rubbery creatures comes from how fluidly they move, but that smooth motion is actually produced by a skeleton with far more moving parts than ours, not by the absence of one.
In fact snakes have a remarkable number of bones. A snake's skeleton is dominated by a long spinal column made of many vertebrae — often a few hundred, and in the longest species well over 400 — and most of those vertebrae carry a pair of ribs. Add the skull and a handful of small associated bones and a single snake can have several hundred bones, far more than the 206 in an adult human. What snakes lack are limbs and the limb girdles that go with them, though some primitive species like pythons and boas retain tiny vestigial hind-limb remnants.
All those vertebrae are what make a snake so flexible. Each joint between vertebrae allows only a small amount of movement, but with hundreds of them strung together the body can curve into tight coils, climb, swim, and form an S-shaped strike. The ribs are not fused into a rigid cage as ours are; they can swing outward and move relatively freely, which is essential for both breathing and the snake's distinctive ways of moving and feeding.
The skull is the other key piece, and it is built for swallowing prey larger than the snake's own head. The jaw bones are loosely connected — the two halves of the lower jaw are joined at the front by a stretchy ligament rather than fused, and several skull bones can move independently. This lets a snake 'walk' its jaws over an animal much wider than its resting mouth. The popular claim that snakes 'unhinge' or dislocate their jaws is not accurate; the bones simply spread apart at flexible joints and return to place.
This skeleton also explains some behavior you might see outdoors. The free-moving ribs let constrictors squeeze prey and let any snake flatten or expand its body in a threat display, and the flexible spine is what allows a snake to disappear into a crack barely wider than its head. It is also why an injured snake can look like it is still 'moving' through muscle reflex — there is a great deal of musculature attached to that long column of bone.
None of this changes the safe way to respond to a snake, but it does dispel the idea that snakes are flimsy or harmless simply because they bend so easily. If you want to know which species is in front of you rather than how its skeleton works, photograph it from a safe distance and let SerpentID compare body shape, scale pattern, and head markers against likely species — then decide whether you are looking at a harmless local snake or one that calls for extra caution.