The 1991 BP National Championships was a men's tennis tournament played on outdoor hard courts in Wellington in New Zealand and was part of the World Series of the 1991 ATP Tour. It was the fourth edition of the tournament and was held from 31 December 1990 through 6 January 1991. Third-seeded Richard Fromberg won the singles title.
|1991 BP National Championships|
|Date||31 December 1990 – |
6 January 1991
|Draw||32S / 16D|
|Surface||Hard / outdoor|
|Location||Wellington, New Zealand|
|Luiz Mattar / Nicolás Pereira|
- It was Fromberg's 1st singles title of the year and the 3rd of his career.
- 1991 Fernleaf Butter Classic – women's tournament