The couple said "I do" in a small ceremony -- with 50 guests -- in Couric's back yard.
"We wanted to keep the wedding just very low-key," Couric, 57, told People magazine. "This is not my first rodeo so I didn't want to go too crazy and neither did John."
The ceremony included readings by both Molner and Couric's children, and Couric's youngest daughter, Carrie, 18, sang.
Couric announced the marriage Saturday on Twitter with a photo of a very happy-looking bride and groom.
So excited to make my debut as Mrs. John Molner! pic.twitter.com/UjvmtT2ki0— Katie Couric (@katiecouric) June 22, 2014