What's your marketing budget?

If $0, then participate in forums where people might spot a link and look for you; post your services to online directories like FreelanceLocalTech (USA only) and FreelanceDesigners (any country); post your portfolio on portfoilio sites; join local business networking organizations and talk to people about what you do; find a bunch of freelance marketers and tag along for the ride; work on SEO and build your website to #1 search response for "<your city> web design".

If you have a marketing budget, use PPC advertising that focuses on your city/state/country (whichever is the appropriate size for your ad budget).