Alginate is a U.S. Food and Drug Administration (FDA)-approved natural biomaterial and has diverse biomedical applications. In recent years, researchers and scientists are working on the alginate-based drug delivery systems that have been designed and characterized as a matrix, micro to nanocarriers, fibers, composite/scaffolds, etc. Alginate hasversatile properties such as biodegradable, biocompatible, nontoxic, and easily available. This book especially highlights both the drug delivery strategies and biomedical engineering aspects such as controlled drug delivery, drug targeting to the site of action, cancer therapy, gene and vaccine delivery, enzyme immobilization, tissue engineering, and regenerative medicine.