Slingsby Aviation was a British aircraft manufacturer based in Kirkbymoorside, North Yorkshire, England. The company was founded to design and build gliders and sailplanes. From the early 1930s to around 1970 it built over 50% of all British club gliders and had success at national and international level competitions. It then produced some powered aircraft, notably the composite built Firefly trainer, before becoming a producer of specialised composite materials and components.

Kirkbymoorside is a market town and civil parish in North Yorkshire, England. It is 25 miles (40.2 km) north of York. It is also midway between Pickering and Helmsley, on the edge of the North York Moors National Park. It had a population of 3,040 in the 2011 census.