Nearly one in five women booking for antenatal care in Ireland is obese. The purpose of this survey was to audit the services and facilities for obese pregnant women in the country's maternity units. In June 2010, a detailed questionnaire was sent to all 20 units which included questions on services, equipment and facilities for obese women. All 20 units responded: 17 (85%) were calculating and recording Body Mass Index in pregnancy. Only 15 (75%) were screening obese women for gestational diabetes mellitus and 2 (10%) were omitting thromboprophylaxis for caesarean section in obese women. Only 3 (15%) had clinical guidelines for obesity and pregnancy. The facilities and equipment, particularly for severely obese women, were inadequate in the majority of units. This survey showed variations nationally in obstetric practices and facilities. It highlights the need to develop, disseminate and implement standardised guidelines on maternal obesity.