Deafs.com is the first and largest dating site for the deaf, ASL and hard of hearing community.
You can create a free profile to test the service and have a look at most of the features. You'll be able to perform some searches to get a feel for the number of personals ads in your vicinity.
If you upgrade you will gain more exposure for your profile, be able to send emails or instant messages to anyone, use the chat rooms, and use the advanced search tools (which makes it easier for you to find a perfect match).
Those are my top two recommended services for you to look into. Here are a few more websites you can try.
Deaf Match Network - Deaf Match Network is a free website that lets you search singles by location or common interests, read messages from other members, add interesting profiles to your favorites, post as many as 5 pictures, and block members who you don’t want contacting you.
Deaf Passions - Deaf Passions is a 100% free internet dating and social networking site for deaf and hard of hearing singles. Features include chat rooms, message boards and email.
All Deaf - All Deaf is a great forum for the deaf community. There’s information about news and current events, hearing aids and cochlear implants, captioning and sign language, education for the deaf, products and technologies, movies, books and tv, and much much more.
There's also information about marriage, dating and single life.