Each state has its own programs so you can't just go to a federal agency to find out what is available. The first thing I did was to search the internet. This link will take you to the search I used.
Many Seniors can continue to live at home with the right combination of services.
The catch is to find out what is available. Again, each state can be different. They help with light housework, meal preparation, laundry, food shopping, etc. Friendly Visitor Programs provide company and social interaction to those who are housebound, and the services are usually free, administered through local senior centers, churches or community groups. But be sure to work out the details in advance.