There are many lists of the fastest growing franchise opportunities for 2012. But what about the fastest growing overall franchise opportunity categories? There are many showing strong potential for growth throughout the current year and for years to come.

Hotel Chains

Hotels require a large upfront investment, but with proper location choice getting them to grow and prosper isn't difficult. However, that location choice is all-important: you can make or break your chances for success when you break ground. Standouts in this category include Days Inn and Hampton Hotels.

Fast Food

Fast food restaurants have long been a staple of franchise opportunity. Americans are widely known for their affinity for fast food, and that love doesn't seem likely to go anywhere anytime soon. Even in densely populated areas with a lot of competition, a new restaurant can thrive. Plus, these tend to have very strong branding, which makes them easy to get going. The downside? They may also be expensive. A lot of equipment is typically required and may put these out of reach for some. Popular examples include Subway, McDonalds, Pizza Hut, Dunkin' Donuts, and KFC.

Convenience Stores

They're quick, they're easy, and they're set to grow. Convenience stores are those little outlets that offer a variety of things. Often attached to or near gas stations, they include drinks, pre-made food, and often basic necessities like toiletries. Prominent companies include 7-Eleven Inc, ampm, and Circle K.

Tax Companies

Taxes have long been considered a strong franchise opportunity because of how constant the demand is. Everyone needs their taxes done, no matter where in the country they may be. In addition, tax companies are known for a fairly low initial investment. You won't need to spend a lot on infrastructure, which really cuts down on the costs. Some of the leaders here are H&R Block, Liberty Tax Service, and Jackson Hewitt.

Fitness

It might be counterintuitive to think of gyms as a franchise, but they certainly are. They're also increasingly popular among people throughout the country. Whether seeking to lose weight or simply become healthier, people are flocking to gyms, and there's room to open one up in virtually all cities. However, there's a significant investment cost involved, which can dramatically impact the accessibility. Leaders include Anytime Fitness and Jazzercise Inc.

Cleaning

A surprising option, but a very strong one. Few people have the time to clean their homes and offices on their own and would much rather have a professional come in and do it for them. Taking advantage of this trend, companies like Stratus Building Solutions and CleanNet USA Inc. are offering services across the country.