Winchcombe (/ˈwɪntʃkəm/) is a market town and civil parish in the Borough of Tewkesbury in the county of Gloucestershire, England, situated 7 miles (11 km) northeast of Cheltenham. The population was recorded as 4,538 in the 2011 census and estimated at 5,347 in 2019. The town is located in the Cotswolds and has many features and buildings dating back to medieval times. In 2021 it was the primary strike site of the eponymous Winchcombe meteorite.

The Belas Knap Neolithic long barrow on Cleeve Hill above Winchcombe, dates from about 3000 BCE. The name Winchcombe derives from the Old English wincelcumb meaning 'corner combe' (valley). In Anglo-Saxon times, Winchcombe was a major community in Mercia, favoured by King Coenwulf of Mercia, the others being Lichfield and Tamworth. In the 11th century, the town was briefly the county town of Winchcombeshire. The Anglo-Saxon St Kenelm, said to be a son of Coenwulf, is believed to be buried here.

During the Anarchy of the 12th century, a motte-and-bailey castle was built in the early 1140s for Empress Matilda, by Roger Fitzmiles, 2nd Earl of Hereford, but its exact site is unknown.

In the Restoration period, Winchcombe was noted for cattle rustling and other lawlessness, attributed in part to poverty. Local people seeking a living took to growing tobacco as a cash crop, although the practice had been outlawed since the Commonwealth period. Soldiers were sent in at least once to destroy the illegal crop.

Fragments of the Winchcombe Meteorite originating from the asteroid belt between Mars and Jupiter, fell on a house driveway on 28 February 2021. The meteorite is a rare carbonaceous chondrite, offering pristine material from the beginnings of the Solar System 4.6 billion years ago. This was preserved by its prompt collection by a local resident about 12 hours after falling to Earth. Another fragment was found by researchers on a local farm. Some of the meteorite fragments were put on display at the town museum.

Winchcombe started life as a Roman hamlet, rising to prominence as an Anglo-Saxon walled town containing Winchcombe Abbey, where a Mercian king and his saintly son were buried. Although the town wall has long vanished, Winchcombe retains much of its medieval layout, with a mixture of timber-framed and Cotswold limestone buildings along its High Street, some dating back to the 15th century.

Winchcombe's position on the Cotswold Way keeps it popular with walkers and history fans. Frequent visits are made to the heritage GWR steam railway that links it with Broadway and Cheltenham Racecourse, and with Sudeley Castle, the burial place of Queen Catherine Parr, which lies on the outskirts.

Sudely Castle also hosts the annual Fantasy Forest Festival, one of the largest Cosplay / Renaissance Faire festivals in the UK.