What is what age is considered senior citizen?

There's no single, universally agreed-upon age that defines a senior citizen. The age varies depending on the context:

• Government programs and benefits: In the United States, the most common age for eligibility for senior citizen programs and benefits (like Medicare and Social Security) is 65. However, some programs have different eligibility ages (e.g., certain Medicare benefits might start at age 62, while other programs might begin later). Other countries have different ages for their equivalent programs.

• Retirement: The typical retirement age is also around 65 in many developed countries, though this is increasingly shifting as life expectancies increase and people work longer. However, many people retire earlier or later than 65.

• Social perceptions: Societal perceptions of "senior citizen" are fluid and vary. While the term might often be used for those aged 65 and older, it's not uncommon to see people in their late 50s or early 60s referred to as seniors, especially in contexts like marketing or advertising.

In short, while 65 is a frequently used benchmark, the age considered "senior citizen" is ultimately a matter of context and depends on the specific situation or definition being used.