There are several different types of raised toilet seats available in the USA, each with its own unique features and benefits. Some of the most common types include:

1. Standard Raised Toilet Seats: These are the simplest type of raised toilet seats that are designed to fit on top of a standard toilet bowl. They are available in different heights and can be made of various materials, such as plastic, foam, or padded seats.
2. Hinged Raised Toilet Seats: These seats have a hinge mechanism that allows the seat to be lifted up and down like a standard toilet seat. They are ideal for households where multiple people use the same bathroom, as they allow for easy access to the toilet bowl.
3. Locking Raised Toilet Seats: These seats have a locking mechanism that securely fastens the seat to the toilet bowl. They are ideal for users who need added stability and security when sitting and standing up.
4. Drop-Arm Raised Toilet Seats: These seats have armrests that can be easily lowered or raised, allowing users to slide onto the seat from a wheelchair or other mobility device.
5. Raised Toilet Seats with Handles: These seats have built-in handles or armrests that provide additional support and stability when sitting and standing up. They are ideal for users who have balance issues or limited mobility.

Overall, there are many different types of raised toilet seats available in the USA, each with its own unique features and benefits. Choosing the right one will depend on the user’s individual needs and preferences.