demography
noun [ U ]
MARKETING uk/dɪˈmɒɡrəfi/ usthe study of people in a particular area, to discover how many have particular characteristics and to record changes in the number of males, females, births, marriages, deaths, etc.:
Demography is the statistical study of human populations.
the number and characteristics of people in a particular area, for example, their ages, sex, and whether or not they are married:
The demography of the area is predicted to change radically over the next 30 years, with large increases in the number of older people.