Grand Pass, MO has a population of 85 and is the 27,309th largest city in the United States. The population density is 782 per sq mi which is 806% higher than the Missouri average and 763% higher than the national average. The median age in Grand Pass is 39 which is approximately 1% higher than the Missouri average of 38. In Grand Pass, 66% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 91% of Grand Pass residents were born in Missouri, 9% were born out of state, 0% were born outside of the United States and 0% were foreign born.