It may not be easy to dispose of an especially large tree stump. The city may not pick it up along with the rest of your yard waste. Contact your city to find out whether it will be picked up or not. If not, ask if there are any additional options. In some places, local recycling centers will take large tree stumps.
If you have several tree stumps to dispose of, it may be worth it to rent a wood chipper and then use the wood chips for various projects around the yard. If it’s allowed in your area, you may also be able to burn your old tree stumps. If you do this, be sure to cover them with scrap wood first. If the stumps are especially large, it may take a long time for them to burn completely away.