From 1990 to 2000, Gallatin County, Montana's population increased by 34.4 percent, ranking Gallatin County the fifth largest Montana county and as the second fastest growing county. From 1970 to 2000, Gallatin County's population increased by over 35,000 individuals. In 2003, Gallatin County was the third most populous and the leading County for growth in Montana. The 2008 U.S. Census puts Gallatin's population at 87,359 residents, which is a 28.8 percent gain or a 19,528 resident increase since the 2000 Census. In 2008, Gallatin County is ranked 92nd of the 100 fastest growing counties in the United States. Approximately 22% of these counties are in the West. Montana's overall population increased 6.2% from the 2000 to the 2008 Census.