Background: Sleep problems are a major concern in population working under stress such as resident doctors. Sleep has many health benefits; sleep problems are linked with short and long term adverse health outcomes. Aim was to study sleep pattern, problems and comorbidities among resident doctors. Methods: A cross-sectional study design with a pre-validated sleep assessment proforma was used to collect information on socio-demographics, sleep pattern, sleep problems and comorbidities from 428 resident doctors found eligible for the study. Results: 350 subjects returned the filled proforma (82% response rate). Mean daily sleep hours were 6.21 (SD, 1.39) and work hours 12.77 (SD, 3.63). Sleep time was night in 64.6%, day in 12%, and both in 23.4%. Monthly average of 5.8 night shifts and 2.03 duty offs were found. Visual analogue scale (0-10) mean scores for sleepiness and tiredness were 4.41 (SD, 2.55; 95% CI, 4.14-4.68; P<0.01) and 4.73 (SD, 2.62; 95% CI, 4.45-5.00; P<0.01) respectively. Presence of different symptoms related to sleep problems ranged from 7 to 26% and various problems interfering with sleep ranged from 10 to 25%. Comorbidities such as allergy (29.4%), jerky legs (24.3%), sinus infections (22.8%), restless leg syndrome (16.3%), snoring (8.3%), asthma/lung diseases (5.8%), chronic diseases (3.4%), severe snoring disturbing others (1.8%), and obstructive sleep apnoea (0.9%) were present. Conclusions: Sleep problems were highly prevalent among resident doctors. The resident doctors were sleep-deprived, overworked, tired, excessively sleepy, and had significant presence of factors affecting circadian rhythm and sleep fragmentation. Various comorbidities were also present with varying prevalence.