Lincoln, ID has a population of 2,808 and is the 9,138th largest city in the United States. The population density is 1,932 per sq mi which is 10025% higher than the Idaho average and 2032% higher than the national average. The median age in Lincoln is 27 which is approximately 23% lower than the Idaho average of 36. In Lincoln, 64% of the population over 15 years of age are married, 92% speak English and 8% speak Spanish. 64% of Lincoln residents were born in Idaho, 29% were born out of state, 0% were born outside of the United States and 6% were foreign born.