The GRAMMY winner's partner, Simon Konecki, was spotted with a similar gold band on his ring finger while running errands around L.A. with the couple's 4-year-old son, Angelo, on Monday.
Adele's rep has no comment.
While the "Hello" singer appears to have secretly tied the knot, in an October interview with Vanity Fair, she said that marrying Konecki wasn't important after five years together, as she thinks "having a child together is the bigger commitment."
"I have no desire to be with anyone in show business, because we all have egos. He's not threatened by any stage of my life that I'm going for, and that's an amazing thing. It's the most serious relationship I've ever been in; we've got a child together and we live together," she said.
"After releasing my first album, all the other people I ever was with were so insecure about themselves -- they couldn't handle it at all. When I try to describe this to my friends they don't always get it, because they go out with people that are our age, but Simon is already who he is, and I'm still becoming who I'm going to be. He's confident. He's perfect," she added.