Most Dependable Unemployment Data?

[Thuy Pham-Satrappe]

Not sure if this is the right place to ask this question, but what have you found to have the most dependable data for unemployment stats for a particular zip code? I've been using bestplaces.net but I decided to cross-reference with city-data.com and the spread is significant (6%).

When I Google "unemployment rate [zip code] yet another website pops up- zipdatamaps.com - with yet another figure.

The website for US Dept of Labor does not seem to have it broken down by zip code.

I'm researching (along with other stats) to determine if I want to invest in a particular area. Thanks in advance!