Searchable Database Plugin

I’m planning to create a website that sells sales lead data. The listings are specified by state, zip code, city, and so on.

What I’m looking for is a plugin that will allow a user to enter a zip code or a city into a search menu and have it bring up all of the listings that meet the specified criteria.

I’ve seen real-estate plugins that do something like this, but I think what I need is even simpler. No pictures or price-ranges, just tell the search menu what you are looking for and have a list populate on the next page.

Does anyone know of a plugin like this. Or does even anyone have an idea of the type of plugin I should be Google searching for?

Any help is appreciated.