The list of notable people is problematic as it can be really easy to miss people, one settler in the County is
Ngo Quang Truong and almost every congressman of the distrcit from past to present would fit in there
Income information si repeated/overlapped in demographics and economy
The claim that Fairfax's income > Vietnam is pretty dubious, as Vietnam has 90 million people compared to 1m. So it wouldn't be unless the GDP per capita is 90 times higher, and according to teh WP page which sources the IMF/WB etc, Vietnam's is about 3000USD PPP. The income per head in Fairfax cannot be $270,000 per year.
Climate and sporting activity is missing. Does the US census keep track of religion because this is also missing
In summary, this article fails on content coverage and referencing.