In the closet may refer to:
- Closeted, a label for lesbian, gay, bisexual, and transgender (LGBT) people who choose not to or have yet to come out of the closet, i.e. disclose their sexual orientation or gender identity, regardless of how they self-identify
- Nicodemite, a person with a hidden religious affiliation
- Protestants pretending to be Catholic, known as Crypto-Protestantism
- Hiding aspects of one's identity, known as "passing"
- Skeleton in the closet (or "cupboard"), a reference to an undisclosed fact or activity from one's past that might have a negative impact on one's public image