A spinning wheel is a device for spinning thread or yarn from fibres. It was fundamental to the textile industry prior to the Industrial Revolution. It laid the foundations for later machinery such as the spinning jenny and spinning frame, which displaced the spinning wheel during the Industrial Revolution.

The basic spinning of yarn involves taking a clump of fibres and teasing a bit of them out, then twisting it into a basic string shape. The spinner continues pulling and twisting the yarn in this manner to make it longer and longer while also controlling the thickness. Thousands of years ago, people began doing this onto a stick, called a spindle, which was a very lengthy process.

The actual wheel part of a spinning wheel does not take the place of the spindle; instead, it automates the twisting process, allowing one to "twist" the thread without having to constantly do so manually, and also the size of the wheel lets one more finely control the amount of twist. The thread still ends up on a spindle, just as it did before the invention of the wheel.

The wheel itself was originally free-moving, spun by a hand or foot reaching out and turning it directly. Eventually, simple mechanisms were created that let a person simply push at a pedal and keep the wheel turning at an even more constant rate. This mechanism was the main source of technological progress for the spinning wheel before the 18th century.

The history of the spinning wheel is disputed, with:

The spinning wheel spread from the Middle-East to Europe by the 13th century, with the earliest European illustration dated to around 1280. In France, the spindle and distaff were not displaced until the mid 18th century.

The spinning wheel replaced the earlier method of hand spinning with a spindle. The first stage in mechanizing the process was mounting the spindle horizontally so it could be rotated by a cord encircling a large, hand-driven wheel. The great wheel is an example of this type, where the fibre is held in the left hand and the wheel slowly turned with the right. Holding the fibre at a slight angle to the spindle produced the necessary twist. The spun yarn was then wound onto the spindle by moving it so as to form a right angle with the spindle. This type of wheel, while known in Europe by the 14th century, was not in general use until later. The construction of the Great Wheel made it very good at creating long drawn soft fuzzy wools, but very difficult to create the strong smooth yarns needed to create warp for weaving. Spinning wheels ultimately did not develop the capability to spin a variety of yarns until the beginning of the 19th century and the mechanization of spinning.

In general, the spinning technology was known for a long time before being adopted by the majority of people, thus making it hard to fix dates of the improvements. In 1533, a citizen of Brunswick is said to have added a treadle, by which the spinner could rotate her spindle with one foot and have both hands free to spin. Leonardo da Vinci drew a picture of the flyer, which twists the yarn before winding it onto the spindle. During the 16th century a treadle wheel with flyer was in common use, and gained such names as the Saxony wheel and the flax wheel. It sped up production, as one need not stop spinning to wind up the yarn.