The 53-year-old star shared a wedding picture on Twitter, the wedding being organized in a splendid garden where floral arrangements were dominated by shades of red and purple.
“True love…so blessed. “By the power invested in me by the state of California…” Thanks,” she tweeted with excitement.
The singer also tweeted a few hours before the ceremony, saying: “a gorgeous, perfect, beautiful day to get married. #shoesonlylove.”
Etheridge wore a gray suit and Wallem, 53, opted for a white dress.
Other guests include Chelsea Handler, Rosie O’Donnell and Whitney Cummings.
Etheridge announced in June 2013 that she would marry her life partner, Linda Wallem.