On May 18, 2013, Smith married his longtime girlfriend Samantha (née Stage). Stage met Smith through her best friend and Smith's sister, Kimberly. Like Smith, she has a competitive personality and is involved in sports. She played volleyball and tennis in high school. Stage is just 5 feet 1 inch (1.55 m) tall, leading to numerous funny photo opportunities. For example, at prom, Smith danced with Stage on his knees. While Smith was at Butler, Stage worked as a nanny and took online classes in psychology.
Smith was called a "goofball" and was a self-described introvert. "He is constantly making me laugh," said Stage. Smith said that would have liked to have six children if he and his wife became financially stable.
It's miraculous. It's an absolute miracle. There is no other way to interpret this. They've been through more in a 20-month marriage than a lot of people go through in the first 20 years. I was amazed. He amazes me every time I talk to him. When he got to Butler he was a really bright guy trying to find his way playing basketball. He became one of the most confident, toughest, hardest-working players I've ever coached. And Sam is an absolute rock.