PURPOSE: The primary objective was to describe 30-day outcomes after primary inguinal paediatric hernia repair. METHODS: Prospectively collected data from the National Patient Registry covering a 2-year study period 1 January 2005 to 31 December 2006 were collected. Unexpected outcomes were defined as either/or hospital stay for >1 day (i.e. 2 nights at hospital or more), readmission within 30 days, reoperations within 12 months after repair including repair for recurrence, and death within 30 days after repair. RESULTS: The study cohort comprised 2,476 patients, and unexpected outcome was found in 267 patients/repairs (10.8 %). Prolonged hospital stay was by far the most prevalent indicator of unexpected outcome. Prolonged hospital stay was in 8.2 %, readmission in 2.1 %, reoperation in 0.7 %, and complications were observed in 1.1 %. One patient died within 30 days after repair, but death was not associated with the inguinal hernia repair. The usual technique was a simple sutured plasty (96.5 %). Emergency repair was performed in 54 patients (2.2 %) mainly in children between 0 and 2 years (79.6 %). During the 1 year follow-up, reoperation for recurrent inguinal hernia was performed in 8 children after elective repair (recurrence rate 0.3 %). Paediatric repairs were for most parts performed in surgical public hospitals, and most departments performed less than 10 inguinal hernia repairs within the 2 years study period. CONCLUSION: These nationwide results are acceptable with low numbers of patients staying more than one night at hospital, low morbidity, and no procedure-related mortality.