The two have been dating since 2015 and got engaged a year ago.
Menzel, 46, shared the news on Twitter, calling the ceremony "magical" and Lohr, 41, "the love of my life."
"Wanted to let you know... Married the love of my life #aaronlohr this weekend @ our home. Dad and son walked me down aisle. It was magical," she wrote.
The happy couple moved in together 2015 after purchasing a house in Encino, California.
Menzel was previously married to fellow Broadway star Taye Diggs from 2003 until December 2013. They share a son, Walker, 7.