Paco Castillo is a Spanish guitar maker based in Albaida, Valencia, that builds handmade classical and flamenco instruments in the traditional Spanish style derived from Antonio de Torres's 19th-century design. The workshop is run by the Juliá family, who launched the brand after spending decades in the Valencian guitar industry, and pairs traditional luthiery techniques with modern manufacturing to keep its instruments at accessible price points.

The catalog spans student-grade through concert-level classical guitars, dedicated flamenco models, cutaway and thin-body electro-acoustic guitars fitted with onboard preamps and pickups, CITES-free guitars built without restricted tonewoods, and traditional Spanish plucked instruments including the bandurria and the laúd. Models are organized by numbered series (such as the 200- and 240-series) covering different combinations of solid cedar or spruce tops with cypress, rosewood, or sapele backs and sides.

The company offers a three-year warranty against manufacturing defects and has collaborated with the Universities of Valencia and Porto on research projects related to instrument construction. Paco Castillo guitars are distributed internationally through specialist Spanish-guitar dealers in Europe and North America.

Paco Castillo has 3 products cataloged on Equipboard, including Classical & Nylon-String Guitars.