This book constitutes the refereed proceedings of the 11th Indian Conference on Logic and Its Applications, ICLA 2025, held in Kolkata, India, during February 3-5, 2025. Four out the five invited talks are included in this book. Out of the 26 submissions, the program committee carefully selected 14 papers to be included in the proceedings. The topics included are Mathematics, Computer Science, Philosophy, Linguistics and Cognitive Science. A special feature of ICLA is the inclusion of studies in systems of logic in the Indian tradition, as well as historical research on logic.