Modified Right-to-Work Law
Colorado is a modified right-to-work state, with the most progressive labor law in the country. The Colorado Labor Peace Act requires two elections and approval from 75 percent of a company's workers before becoming unionized.
Without the 75 percent approval, there can be no all-union agreement in the collective bargaining agreement, just as in a right-to-work state. In 2015, only 9.3 percent of Colorado’s workforce was a member of a union. A 2015 study showed that Colorado employment grew six times faster than unionized states from 2008-2014. For more information, see the blog post "Colorado has the best labor law in the nation" by Tom Clark, CEO of the Metro Denver EDC.