In mathematics and statistics, Q-distribution or q-distribution may refer to:
Q-function, the tail distribution function of the standard normal distribution
Studentized range distribution, the distribution followed by the q-statistic
q-analog distributions: Gaussian q-distribution, a family of probability distributions that includes the uniform distribution and the Gaussian distribution q-Gaussian distribution, a type of Tsallis distribution q-exponential distribution, a type of Tsallis distribution q-Weibull distribution, a type of Tsallis distribution