In Computer Science, a Data Structure is a particular way of storing and organizing data in a computer. Algorithms and data structures are the basic tools of the programmer. The concept of Data Structures is considered to be one of the most important courses in Computer Science as it equips the students with fundamental building blocks for the development and design of complex systems such as Operating Systems, Compilers and Database Management Systems. This book entitled “Data Structures Using C” presents basic concepts of Data Structures and its applications in simple and lucid way. It can be used as a reference to the students of all levels. We are sure that this book is user friendly which encourages the students to read and make them comprehend the concepts in an easy way. A Structured approach is followed to implement all the concepts supported by an example followed by program in C language