Is 57 the age of a senior citizen?

At the age of 62, one can retire with social security benefits within the US, and is considered to be the age of a senior citizen by many organizations. However, the federal government has determined one who is 65 years of age or older is senior citizen.

Organizations such as AARP and most businesses consider age 55 as senior citizen and you would receive the standard senior discounts. So there are various opinions, but age 55 is about the youngest considered age.