Obsessive–compulsive personality disorder (OCPD) is a personality disorder characterized by a pervasive pattern of preoccupation with orderliness, perfectionism, and mental and interpersonal control at the expense of flexibility, openness, and efficiency.

OCPD is a chronic non-adaptive pattern of extreme perfectionism, preoccupation with neatness and detail, and a requirement or need for control or power over one's environment that results in major suffering and stress, especially in areas of personal relationships. Persons with OCPD are usually known to be inflexible and extremely controlling. They may find it hard to relax, and feel the need to plan out their activities down to the minute.

To receive a diagnosis of OCPD, a person must meet four or more of the following characteristics listed in the DSM-IV-TR (2000):

1) is occupied with details, rules, lists, order, organization, or agenda to the point that the key part of the activity is gone 2) demonstrates perfectionism that hampers with completing tasks; 3) is extremely dedicated to work and efficiency to the elimination of spare time activities; 4) is meticulous, scrupulous, and rigid about etiquettes of morality, ethics, or values; 5) is not capable of disposing worn out or insignificant things even when they have no sentimental meaning; 6) is unwilling to pass on tasks or work with others except if they surrender to exactly their way of doing things; 7) takes on a stingy spending style towards self and others; and 8) shows stiffness and stubbornness.