Our Senior dating site is the #1 trusted dating source for singles across the United States. Register for free to start seeing your matches today!. eHarmony is the premium online dating destination that helps you to meet singles you're truly compatible with. At eHarmony we take the time to get to know you. Log-In to Your eHarmony Account to Meet Singles on the #1 Trusted Online Dating Site. We Match Singles Based on Compatibility for Successful Relationships.