See this page for the original source: http://alex.leonard.ie/2011/06/30/wordpress-check-if-post-is-in-custom-taxonomy/ As of WP 3.2 – there’s no core conditional function for checking whether a post belongs to a taxonomy term. A bit of searching around found this WordPress Support forum post by Justin Tadlock explaining how do check against a specific taxonomy. I’ve expanded this function a little bit  Full Article…