There is increasing evidence to implicate vitamin D deficiency in a variety of diseases. Previous advice has been to screen high‐risk pregnant women. This study shows that, despite abundant sunshine and latitude consistent with year‐long vitamin D synthesis, 65.5% of a largely low‐risk antenatal population in rural Victoria have insufficient vitamin D. Over 5.0% of women have vitamin D levels that pose a significant neonatal and adult health risk. These findings support routine antenatal testing of vitamin D levels.