Yes. Most of the insurance companies do provide marriage discounts for insurance. The discount ranges from 6%-16%. You can provide your zip code at the SafeButler tool to see how much percentage discount is available for your state.
The information in this answer is general in nature and is not legal or insurance advice for your specific situation. Policy language varies carrier by carrier; your declarations page is the final word. If you're unsure, call your agent before you need to file.