In homes, outlets are normal wired in series. What that means is power goes to one, then from that one to the next, then from that one to the next and so on. If you have the blueprints for your home you would be able to tell if all those outlets are wired on the same circuit, which mostly likely they are.
To figure out where the problem is go to the first outlet that isn't working and try and find the closest working outlet from there. If its a ground-fault short, that outlet you come to should be a GFI (ground-fault interrupter) outlet and will have a 'test' and 'reset' button. Hit the 'reset' button. If that fixes it you should be good to go. If it doesn't, try flipping the breaker in your panel for 'receptacles.' If that doesn't work, call an electrician.
There's a possibility that half of the breakers in your breaker box have been tripped. Or that one side of the wiring that comes into the house is faulty (that happened to me a couple of years ago). Either way, I would suggest calling an electrician to find the problem and fix it. Electricity is something that an amateur shouldn't mess with. :-)