Are you searching for a family member; former classmates; past friends or coworkers? If so, then you may want to start your people search by posting a message to the Craigslist community message boards. The craigslist boards have a Missed Connections section under the Personals area, where you can post messages about people you are searching for.
The type and amount of information that you choose to include in your people search post is up to you, but be sure to post it in the city where the person is likely to be found. For instance, if the person you are searching for has ties to San Francisco and you live in NYC, then post the people search message in the San Francisco Missed Connections section.
You can find a list of available cities at Craigslist . Choose your city, then choose Missed Connections under the Personals section. You will need a valid email address to make a people search post on these boards.