Ms Gabbard had announced her engagement in January.
Tulsi Gabbard, the first-ever Hindu-American in the US Congress, tied the knot with cinematographer Abraham Williams in a Vedic ceremony in her home state of Hawaii.
The marriage between 33-year-old Ms Gabbard and 26-year-old Williams at the historic Kahaluu Fishpond yesterday concluded with a traditional yoga 'kirtan' and was attended by a large number of US lawmakers besides Ms Gabbard's friends and family.
The marriage ceremony that was conducted in a Vedic fashion ended with song and dance, local media reported.
In previous media interviews, Ms Gabbard said she will retain her last name.
Hawaii will always be the couple's primary home, local media reported.
The Democratic Congresswoman from Hawaii, Ms Gabbard, had announced her engagement in January.
"Both Abraham and I are generally kind of private people. He has nothing to do with politics. He's a humble, great guy who doesn't want to be in the limelight, so this is something new to the both of us," she told the Honolulu Star Advertiser in an interview published in February.
This is Ms Gabbard's second marriage and the first for Mr Williams.