Background: Psoriatic arthritis (PsA) is type of inflammatory arthritis associated with psoriasis. There are multiple patterns of joint involvement in patients with psoriasis Aim: To determine the frequency of arthritis and its different types in patients of psoriasis presenting at a tertiary care hospital in Lahore Methods: This cross Sectional study was conducted in Dermatology Department of Services Hospital, Lahore from 11th April, 2017 to 10th October, 2017. Two hundred and sixty patients having psoriasis were enrolled in the study, Patients’ detailed history about psoriasis, duration of psoriasis and joint pain or stiffness was taken. After written and informed consent Physical examination was done to determine the type of psoriasis and nail involvement. All the joints were examined for tenderness and deformities to assess the evidence of arthritis and its different types according to the site of involved joints. Results: Total numbers of patients included in the study was 260; in which 176 (67.7%) patients were males and 84 (32.3%) were females with the total mean age of 38 ±13.22 years. Out of 260 patients, 62(23.8%) patients had psoriatic arthritis (PsA), Out of these 62 patients having PsA, 23(37.1%) patients had Oligoarthritis, followed by Symmetric arthritis 19(30.6%) patients, Distal interphalangeal arthritis (DIP) in 15 (24.2 %). Conclusion: Our study concluded that almost one fourth of psoriasis patients had arthritis, asymmetrical oligoarthritis/monoarthritis came out to be the most common type in our study followed by symmetric polyarthritis, distal interphalangeal arthritis (DIP), Arthritis mutilans and axial arthritis Keywords: Psoriasis, types of psoriasis, arthritis, psoriatic arthropathy