“Old age” is a term we don’t usually apply to ourselves. Whatever our age, we generally think of other people as being old.
At the official level, the term “seniors” is often applied to anyone over the age of 55; while “Seniors Cards” are generally provided to people over 60 who are not in full time employment. From a medical point of view the line is usually drawn at 65.
Whatever definition we use, people in the older age group are certainly increasing in number, as a proportion of the total population. It seems older people are becoming more popular too. They are being specifically targeted by providers of goods and services – including governments. The aging “baby boomers” are expected to have greater purchasing power.