"According to Census data, the median household income in Palo Alto is $137,000 a year, while the US average is $57,600"
from: https://www.cnet.com/news/silicon-valley-middle-class-earns-...
from: https://www.cnet.com/news/silicon-valley-middle-class-earns-...
https://www.bizjournals.com/sanfrancisco/news/2016/12/01/pro...
If you sold your company, aren't working at FB/goog/etc and are sitting on a ton of stock holdings, your income is going to show as near $0