Boron is an element with a wide range of uses. Boron, which is the main component in boron minerals, is present as a minor component or even a trace component in other sources. Depending on the increase in the boron usage areas, the boron concentrations in environmental samples such as water, soil and air is also increasing. Therefore, it is important to determine boron in such samples accurately and precisely. In order to determine boron in various sample matrices, various analytical methods have been developed and used. This review focuses on the analytical methods for the determination of boron in various sample matrices. This review covers approximately the last four years (2015-August 2018), offering a critical review of the boron determination by various techniques.