Snip off the microwave electrical cord. This reduces the chances that a child or animal could get shocked or entangled. Put the cut cord inside the microwave.
Call your local recycling plant. They'll tell you if they take microwaves, as well as how and when to bring the microwave to the facility. Ask the representative whether there is a charge for bringing in the microwave, as some facilities charge fees to cover operating costs and keep waste under control.
Phone your local appliance shops or the microwave manufacturer. Some shops and manufacturers will buy worn-out microwaves for their parts.
Take the microwave apart as much as you can. Sort the parts into piles based on materials, such as plastic and metal. If your recycling facility won't take the entire machine, they or someone else may be willing to pay you for the materials.
Contact your trash company. They may take the microwave to a recycling facility for you if a local recycling plant isn't nearby, although they may charge a fee for the service.