Jonas Patrik Ljungström (12 March 1827 – 22 October 1898) was a Swedish cartographer, geodesist, and teacher at the Royal Institute of Technology.

His great grandfather was the Protestant reformer Peter Spaak, and his third great-grandfather early industrialist Abraham Hülphers the Elder.

While in Philadelphia in 1876 he met the Swedish physicist Salomon August Andrée who remained a friend of the family until his death, teaching Ljungström's sons Birger and Fredrik in physics.

The most successful of his inventions, the distance tube land surveying precision instrument, endured in professional use until the 1950s.

Noted by John Ericsson (1803–1889) as "an innovative mind of extraordinary capability and extensive mechanical wit", Ljungström's works are represented by the Swedish National Museum of Science and Technology,[2] as well as by regional cultural heritage museums.