Yes you will! Interest accrues on a daily basis the day after you deposit, so if you deposit mid month you will receive an interest payment for the number of days the deposit was in your Interest Account.
For example, if you deposit on the 15th, you will earn ~15 days worth of interest.
If you deposit on the 20th, you will earn ~10 days worth of interest.
Each deposit is prorated based on the number of days that the specific deposit was in the account.