Zombies may be the walking undead, but their contribution to Main Street’s economy is very much alive. In modern times, the zombie genre has evolved from a cult following to a highly popular theme. 24/7 Wall St. estimates that the today’s zombie genre economy is worth billions of dollars.

Read Zombies Worth Over $5 Billion To Economy

Think way beyond zombie movie ticket sales. Think about DVD sales, video games, comic books, novels, Halloween costumes, zombie walks, merchandise, conventions and even zombie art. Add to that all of the websites, homemade movies, Facebook sites, YouTube sites and other forms of “digital” zombies, not to mention music. And if you think the financial tab has been high so far, by the end of 2012 the tab is going to be far larger.

Of course, figuring out the exact dollar figure around the “value of zombies,” despite hours of research and interviews with “zombie insiders,” is difficult. Many companies and top industry leaders do not share any sales data and they do not want to divulge how much they make off this craze. On a global scale, the market is even larger. Could this craze be tied to the hard economic times?

Bestselling zombie genre author Max Brooks noted on his website, “I think they (zombies) reflect our very real anxieties of these crazy scary times. A zombie story gives people a fictional lens to see the real problems of the world. You can deal with societal breakdown, famine, disease, chaos in the streets, but as long as the catalyst for all of them is zombies, you can still sleep.”

Regardless of the reason, zombies are worth billions of dollars. The figure that we were able to piece together: $5.74 billion. In all honesty, this tab is grossly undercalculated in each category. By the time you add the money spent in total around the zombie genre, the figure is much higher.

These are 24/7 Wall St.’s estimates of the zombie economy.