Here is a listing of the best business directories that can be found on the web:

Online Biz Directory is an online directory for small businesses that provides 26 different categories of businesses. In addition to their free listing services, they also offer premium listing and advertising services for a nominal fee.

Business.com is the leading online business directory. They offer over 65,000 business categories and even have detailed guides of what the category entails upon clicking a link.

Where 2 Go is an online business directory that provides three simple to use search features and provides a “search tips” section, for those who would like more targeted results.

Yellow Pages had to be on this list. Yellow Pages provides an extensive online business directory not only for the US, but all across the world. The business directory even provides a mapping feature to help you find your way to a business.

US City is an online business directory with clear navigation. This business directory doubles as a weather man and a Ticket Master, because you can check the local weather and purchase tickets to shows and games online.

Mex Online is not only an online business directory, but it is also an online guide to Mexico. You can read and post local classifieds and interact with others through the message boards.

MacMillan online business directory offers much more than an online directory for business. The site hosts a Business Center which provides free tips on SEO and increasing page rank.

Biz Highway is a massive online business directory that allows you to load your business into the system for free. This business directory also has a buy/sell a business feature. That’s right; you can buy or sell businesses through this directory.

Free Online Business Directory , the name pretty much explains the basics of the directory, but they also offer link exchange programs amongst members to help increase website traffic.

Jigsaw is a free online business directory that hosts over 11 million business contacts and over 2 million public company records.

D&B Power Profiles is the online business directory which hosts the profiles of over 26 million businesses.

Thomas Net is an online business directory that also provides a large library of business resources and services.

Merchant Circle is a basic online business directory. The directory doesn’t host all of the bells and whistles that most of the other business directories have, but it gets the job done.

Yahoo! Directory is a B2B (Business to Business) online directory. The site is basic, but easy to navigate.

Bluffs Online is an online business directory that also offers custom web development and technical tips.

Rate Point is one of the most resourceful online business directories. To list your business with Rate Point there is a monthly fee of $17.95 but this fee includes online marketing tools, survey tools, customer feedback and email marketing.

Directory B2B is an online business directory that sells directory space with additional tools, such as promoted text links.

Biz123 is an online business directory that requires you to purchase all inclusive online marketing packages when listing your business. These packages include text link ads with high placement, enhanced listings and one way links.

Search Biz is an online business directory that requires you to purchase a business traffic package in order to submit a site. The business traffic packages include services like one way links and higher placement on the SERPS.

Coco Directory is an online business directory which requires you to purchase a general traffic package in order to list your site. The general traffic packages include services like one way links, higher page rank and ads on relevant blogs.

Interbiz Directory is an online business directory that requires you to pay an annual fee in order to include your site in the directory.

Dirquick offers three ways in which you can list your business in their directory. You can purchase a sponsored banner, suggest a link or sponsored link space.

Business Scent requires you to pay an annual fee to list your business in their directory. They offer business traffic packages, but they also offer a basic inclusion which is priced at $19.95 a much lower fee than most other directories.

URL Web Directory is an online business directory that requires you to pay a small annual fee in order to have your business listed in their directory. However, they do offer $100 worth of ad links at no extra charge when you include your business in their directory.

Business Directory Online is an online business directory which requires you to pay a $50 annual fee to have your website included in their business directory.