The Martin family has been selling guitar strings as long as they’ve been making guitars and we’ve been engineering and producing our own line of strings for decades. Today, C. F. Martin & Co. ranks among the largest producers of acoustic guitar strings in the world. It is also one of the few guitar companies to make its own strings. C. F. Martin Strings are engineered in Nazareth, PA — by guitar players, for guitar players — with the same care and passion that we pour into making our fine guitars because the goal is one and the same: to produce the best sounding guitar in the world.