Chartered Statistician
（重定向自CStat）
Chartered Statistician (CStat) is a professional qualification in statistics offered by the Royal Statistical Society in the United Kingdom. A chartered statistician may use the post-nominal letters CStat.
The qualification requires achievement of an approved academic qualification (either the Royal Statistical Society's Graduate Diploma in Statistics or a degree in statistics) together with suitable professional experience, usually of at least five years. Prior to completion of the necessary professional experience, but after completion of an approved qualification, members may use the professional qualification Graduate Statistician, and use the letters GradStat.