Senator Tim Scott of South Carolina, who for years faced speculation about his marital status, on Saturday proposed to Mindy Noce, his girlfriend and an interior designer who lives in Charleston. She said yes.

It’s been a whirlwind few days for Mr. Scott, whose endorsement of former President Donald J. Trump at a New Hampshire rally on Friday renewed talk about his consideration as a running mate, should Mr. Trump win the Republican nomination.

The engagement, which was first reported by The Washington Post, comes after more than a year of dating. Mr. Scott made his relationship with Ms. Noce public when he brought her onstage after a Republican presidential primary debate — the last he would participate in before suspending his campaign in November. The two met at church.

A spokesman for Mr. Scott, Nathan Brand, confirmed the engagement, which took place on Kiawah Island, S.C., near Charleston. Mr. Scott and Ms. Noce had a celebratory dinner afterward and Ms. Noce attended church the following morning, wearing her engagement ring.

Mr. Scott shared his news with a national audience on “Sunday Night in America,” the Fox News program hosted by Trey Gowdy, his friend and a former South Carolina congressman.

Mr. Scott, a longtime bachelor, attempted to keep his relationship status quiet. Even so, his bachelorhood had been the subject of much scrutiny during his presidential run and in his Senate career. Asked multiple times on the campaign trail about his marital status, Mr. Scott often demurred, saying he was praying for the right woman before taking that step.

“One of the things I love about the Gospel of Jesus Christ is that it points us always in the right direction. Proverbs 18:22 says, ‘He who finds a wife finds a good thing and obtains favor from the Lord,’” he told Brenna Bird, the Iowa attorney general, in September. “So can we just pray together for me?”