The Top 3 American online dating agencies are the following: Match (#57), American Singles (# 179) and Date (# 658). High ranking though does not prove quality of the online dating site. But it does mean that they are used by millions.
Match.com
Match is probably the best online dating site. It has an Alexa ranking of 57 and a membership of over 8 million, Match is the largest and most successful online dating agencies on the net. The main site of this one of the best online dating sites focuses on the USA, but it has more than 30 'sub sites' focused on many languages and many countries around the world. This best online dating site comes strongly recommended and it is also a pioneer of online dating that has grown from strength.
American Singles
This is the second best online dating agency with an Alexa ranking of 179. This one of the best online dating site is for North American only - USA and Canada. It is not recommended for other countries. This best online dating site offers a number of advanced features and free to sign-up. Also free to send 'teases' even if you are not a paid-up member. Technical support is provided for those who are not sure how things work. This best online dating site is also highly recommended.
Date
Date.com is one of the best online dating sites on the Internet today. It garnered an Alexa ranking of 658 and is primarily US-based. However it does enable searching by region - United States, Canada, United Kingdom, Latin America, Caribbean, Middle East, Europe - Western, Europe - Eastern, Oceania, Africa and Asia.
The runners-up for the best online dating sites are : MatchMaker, FriendFinder, DatingDirect, DreamMates and eHarmony.