The Boy Is Mine is the second studio album by American R&B recording artist Monica. It was released by Arista Records on July 14, 1998, in the United States. The album deviated from the formula of her debut Miss Thang (1995) as she had more creative control over the material she wrote and recorded; a step that she considered a "natural progression". On the record, Monica worked with a variety of producers and writers from different genres such as gospel, R&B, and hip hop, including frequent collaborators Dallas Austin, Colin Wolfe, and Daryl Simmons. Additionally, she wrote and produced the album's material with David Foster, Diane Warren, Jermaine Dupri, and Rodney Jerkins and his Darkchild crew, some of which would become household names on subsequent albums.

The Boy Is Mine may refer to:

• "The Boy Is Mine" (song), a 1998 song by Brandy and Monica
• The Boy Is Mine (album), a 1998 album by Monica