Several payment databases allow you to access lists of companies in a given sector. You can filter by geographical location, company size, revenue figures, etc. Some of the most popular are Dun %26 Bradstreet (Hoover), Mint Global, LexisNexis and S%26P Capital IQ. Look for the orange button to download the CSV files.
Many libraries (both university and public libraries) offer free online access to business databases, and some of them offer lists of new companies. A business directory is an online list of companies within a particular niche, location, or category. In addition to improving your local SEO, they can also improve your search engine rankings, since listings tend to link to your site. You can improve visibility by publishing the NAP (name, address, phone number) of your local business in directories, online business listing sites and dating sites.
Add your local business to some of these business listings and directories today and watch your business and customer base grow. David Sarokin is a well-known Internet specialist with publications on a wide variety of business topics, from the best uses of information technology to the steps to create your company. All you have to do is list your company in online business directories such as Yellow Pages, Manta, and more. If you're not yet a member of your Chamber of Commerce, you can consider joining; business lists may only be available to other members.
There are many location-specific, industry-specific business listing sites where you can submit your details.