Berkely is in the San Francisco-Oakland-Hayward MSA, which had the fourth-highest per-capita income on the 2010 US census and is likely to place higher on the more recent one. It's absolutely one of the highest-income metropolitan areas in the world.

In addition, looking a college town median income is a demographic anomaly. There are 50000 people at the University with zero income.

If you look at prime-earning-age householders in the Census, Berkeley is way off the scale.