Idaho Population 2018
Our 2018 estimate for Idaho's population is 1.75 million, based on the most recent Census estimates and its current growth rate of 0.89% per year.
Situated toward the northwestern edge of the United States, Idaho is one of the larger states in the country, and its population growth statistics are impressive as well. The last set of confirmed figures comes from the official Census of 2010 which declared that there were 1,567,582 people living in the state -- a rise of just over 20% on the numbers declared in 2000.
An updated estimate on those figures was released in 2011, and it was suggested that the population of Idaho had increased to 1,584,985, making it the 39th largest state in the US. As of the 2015 estimates, the population had increased to 1,654,930.
Idaho Population Density
At a total surface area of 83,570 square miles, Idaho is the 14th biggest state in the country, and even without looking at population density figures, it’s already clear from a population of just over 1.6 million that Idaho must be a very sparsely populated state.
In fact, there are just 19 people for every square mile of land, and only six states in the US can claim a more sparsely populated landscape.
There are a number of reasons for this, mainly because parts of Idaho are inhospitable for permanent settlement. The Rocky Mountains dominate much of Idaho’s skyline and the state is also home to sprawling lakes.
Idaho Population History
Idaho was part of Oregon Territory, definitively acquired in 1846, and was included in Washington Territory upon its establishment in 1853. Idaho became a separate territory in 1863, acquired essentially its present boundaries in 1868, and was admitted as a State on July 3, 1890. Census coverage of present-day Idaho virtually began in 1870, when nearly its whole area was included.