Most senior citizens, aged 65 or older, have relatively low household incomes. Median household income for people over 65 years is just $33,118 compared to a median of $50,054 for the entire population.
I got 2011 data from the Census Current Population Survey Table HINC-02. Age of Householder--Households, by Total Money Income in 2011, Type of Household, Race and Hispanic Origin of Householder
The census data breaks it down into chunks of $5,000 up to $200,000. But I'll show it in fewer chunks to simplify.
Here it is broken in a couple charts :
50% of senior households have income between $5,000 and $30,000.
18% of seniors make under $15,000 a year.
11% of senior households have incomes of $100,000 or more.
At the top, 2% of seniors take in $200,000 or more.