Can veneers fix a single crooked tooth?

Technically yes...: But it depends on which tooth, how malpositioned it is, and your bite. Sometimes the result is not as esthetic as having the tooth straightened orthodontically. As an adult you may be a candidate for invisalign. Have a consult to find out.

Absolutely: You need to go to a dentist to have the condition looked at but a veneer can correct a crooked tooth, so can a crown so can orthodontics.

Yes: Veneers can easily and conservatively change the shape, position and color of teeth. A dental mock up can show the possibilities.

Of course: It would be possible to correct a single crooked tooth with veneer but it would take more than one to make it look perfect.

Good solution: If it is only 1 tooth, and it is not severely misaligned, a veneer may be perfect. If what you perceive as only 1 tooth being misaligned is actually symptomatic of a more serious generalized malocclusion, tooth straightening may be indicated. Talk to your Dentist.