does a 2009 ford focus se have a usb port

You mean a fault scan port? Yes.

Where is it at?

Underneath the dashboard, driver's side. you may have to get on your knees from outside the car and look

The power train control module (PCM) is the main computer in a Ford Focus. The computer controls all of the engine's functions as well as the transmission and anything relating to the moving parts on the vehicle. When the computer senses a problem with one or more of the vehicle's components, it will store a trouble code in its memory and illuminate the service engine light. Use a computerised automotive scan tool to scan the PCM, retrieve any trouble codes and turn off the service engine light.

if your focus has sync the the usb port is right down by the aux jack