Along with her siblings, Lauren was homeschooled growing up. She has attended at least one IBLP homeschool conference.
On September 14, 2010, TLC aired an episode of the reality TV show 19 Kids and Counting featuring Lauren's family, entitled "Duggars Do Dinner". In the episode, Lauren and her family visited the Duggar family home for a dinner party. At the time the episode was filmed, the Swanson family had five children.
While Lauren was hanging out with some of Josiah Duggar's siblings during a girls' night out in late December 2017, Josiah surprised Lauren and asked her if she wanted to enter a courtship, and she said yes.
The couple publicly announced this courtship on the Duggar family website on January 23, 2018.
On March 5, 2018, Josiah and Lauren announced on the Duggar family website that they were engaged. Josiah proposed to Lauren on her family's property in Milledgeville, Georgia, at the same place where her parents got engaged. The proposal took place February 24, 2018.
Lauren married Josiah Matthew Duggar on June 30, 2018, at John Brown University's Cathedral of the Ozarks in Siloam Springs, Arkansas. The wedding was officiated by her father, Dwain. Her bridesmaids were her new sisters-in-law Jana, Joy-Anna, Kendra, friend Hannah Millsap, one other friend, and two of her sisters. One of her brothers was among the groomsmen, and another of her brothers was the ring bearer. Her dress was purchased from The White Dress Boutique.
Josiah and Lauren were expecting a child, but suffered a miscarriage in October 2018. They affectionately called the baby Asa.
On May 20, 2019, they announced that they were expecting their second child, due in the Fall of 2019. On June 25, 2019, they revealed that they were having a girl. Their daughter, Bella Milagro was born on November 8, 2019, at 5:24 p.m., weighing 6 pounds and 5 ounces, measuring 18 ½ inches long.