The demographics of Kazakhstan enumerate the demographic features of the population of Kazakhstan, including population growth, population density, ethnicity, education level, health, economic status, religious affiliations, and other aspects of the population. Some use the word Kazakh to refer to the Kazakh ethnic group and language and Kazakhstani to refer to Kazakhstan and its citizens regardless of ethnicity, but it is common to use Kazakh in both senses. It is expected that by 2050, the population will range from 23.5 to 27.7 million people.

According to various polls, the majority of Kazakhstan's citizens, primarily ethnic Kazakhs, identify as Sunni Muslims. In 2020, Shia Muslims made up 0.55% of the population.