Rockland, ID has a population of 410 and is the 20,740th largest city in the United States. The population density is 1,462 per sq mi which is 7564% higher than the Idaho average and 1514% higher than the national average. The median age in Rockland is 35 which is approximately 3% lower than the Idaho average of 36. In Rockland, 64% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 56% of Rockland residents were born in Idaho, 43% were born out of state, 0% were born outside of the United States and 1% were foreign born.