He is the brother of Samuel Dillard.
On August 20, 2014, Jill and Derick Dillard announced they were pregnant with their first child. This announcement came only two months after the couple's wedding: "We're having a baby! We are so excited," Jill said. After taking several pregnancy tests, Jill's sisters persuaded her to take another while visiting her parents' home. "It was surreal," Derick said. "We were shocked, both of us are so excited." In their announcement, the couple said they were due in March of 2015. "About 30 days after Jill and Derick got married they gathered everyone in the living room and shared the news," Jill's father, Jim Bob said of the announcement. "Everyone was clapping and cheering, and we were in shock, too.". This announcement earned Jill and Derick the cover of the September 1, 2014, edition of People Magazine.
On September 3, 2014, Jill and Derick gave an interview on why they chose to announce their pregnancy at only 8 weeks. "Understanding that the majority of miscarriages happen within the first trimester, and believing that every life is precious no matter how young, we decided to share our joyful news as soon as we could," Jill stated.
Throughout her pregnancy, Jill documented her progress with weekly baby bump photos on her Instagram page.
On April 6, 2015, at 11:49pm, Jill gave birth to her first child, Israel David Dillard via an emergency C-section. He weighed 9 pounds and 10 ounces and was 23 inches long.
In a statement on the Duggar family's Facebook page, Jim Bob and Michelle Duggar announced: "We are so thankful for a healthy Mom and baby! Love this sweet baby Israel! We are happy grandparents and we promise more pictures soon!".
Jill and Derick had planned on having Israel at home, which they were vocal about during the pregnancy. "I feel like it will be way more relaxing... and having the baby at home with a midwife provides more of that personal care. It's more intimate for the couple as well, getting to be in your own environment," Jill said in one interview. This home birth proved impossible. "His birth didn't go as expected," Jill said of the birth. "But having him here - it's worth all of it. I wouldn't do anything differently.".
In an interview published on April 14, 2015, Jill said that after being two weeks after her due date, her water finally broke. She tested positive for strep B, which can be passed from mother to baby during birth, and had to begin taking antibiotics through an IV. 20 hours into labor, they saw a faint sign of meconium and moved to a hospital. Jill initially declined Pitocin to speed her labor. After 70 hours of labor, the baby had flipped into a transverse breech position and experienced irregular heart rates. At this time, the couple and their doctors made the decision to move forward with an emergency C-section. "I love our birth story because it bonded us so well," Jill stated. "I still haven't changed a single diaper. Derick has been changing them all.".
He was the ring bearer at his family friend Mandie Query's wedding to David Poemoceah on November 16, 2019.
He started kindergarten at Rogers Elementary School on August 24, 2020, when the 2020/2021 school year began.