Yes, but when it will be counted varies from state to state.
Most states count absentee ballots on Election Day, though some states count up to 10 days after the election. Go to the Election Official Directory if you want more information about how your state processes absentee ballots. Choose your State and Region to find the link to your Local Elections Website. You can go to that site for more state specific information.
If your region does not have a website, you will have to contact your local election official, you can find this information in the Election Official Directory.