Birstwith is a village and civil parish in Nidderdale in North Yorkshire, England. It is situated on the River Nidd. According to the 2001 census, the parish had a population of 756 and increased to 868 based on the 2011 Census.

Birstwith Mill on Wreaks Road is run by Kerry Ingredients, a food products manufacturer. The River Nidd provided water for the mill, and although sluice gates and a mill race exist, the water wheel no longer turns—an existing weir provides the mill with a head of water. The mill race rejoins the river downstream. About 1 mile (1.6 km) upstream is a packhorse bridge.

The local public house is the Station Hotel which acts as a meeting place, and venue for organised charity events such as the Birstwith Coast 2 Coast Cycle Challenge. The village has a store and post office, and a doctor's surgery which is part of a Nidderdale medical group. Sport facilities include a cricket pitch, tennis courts, and a snooker room.

The village had a railway station on the NER line running between Harrogate and Pateley Bridge. The goods yard became Birstwith Grange, a housing development for commuters. The railway line continued along the Nidd Valley and was used in the construction of Scar House and Angram reservoirs.

A village primary school and a Reading Room, built and donated by the owner of the local Swarcliffe Hall around 1880, still exist today. In the mid-1970s Swarcliffe Hall was sold and the contents auctioned, the building became a private prep school. Today Birstwith has a Church of England primary school, and a private school which occupy Swarcliffe Hall.

St James' Church, Birstwith was completed in 1857 and is a grade II listed building.

In 2017 Birstwith In Bloom was established. Birstwith won a Silver-gilt at the Yorkshire in Bloom awards, this was the first time the village had entered the competition.

• Listed buildings in Birstwith

• Birstwith Parish Council website
• The Station Hotel, Birstwith
• The Annual Birstwith Show