I am losing outlets but I don't have circuit breakers tripping. So far I have replaced two outlets and flipped all breakers off/on and the outlets are still dead.

Have you isolated out the entire circuit from breaker to the end of the circuit or is the failure effecting multiple circuits?

The most common failure, in my humble opinion, would be loose connections. Particularly if your receptacles are "Back stabbed" (The conductors are stuck into the back of the receptacle as opposed to attached to the screws on the side of the receptacles.)

Of course, it is possible that your Neutral service conductor is loose or that one of the service conductors that feed the bus in the main panel is failing. This needs to be checked by the Power Company, not you!

Other failures may be caused by aluminium wiring.