This volume contains the proceedings of the 11th conference on AGC2T, held in Marseilles, France in November 2007. There are 12 original research articles covering asymptotic properties of global fields, arithmetic properties of curves and higher dimensional varieties, and applications to codes and cryptography. This volume also contains a survey article on applications of finite fields by J.-P. Serre. AGC2T conferences take place in Marseilles, France every 2 years. These international conferences have been a major event in the area of applied arithmetic geometry for more than 20 years.