"An estimated 10,400 American Indian and Alaska Native (AIAN) inmates were held in local jails at midyear 2014, up from an estimated 5,500 at midyear 1999 (figure 1, table 1). 1 At midyear 2014, AIAN inmates accounted for 1.4% of all (744,600) local jail inmates (figure 2). The percentage of AIAN inmates held in local jails remained stable from 2006 to 2014. Data in this report are from the Census of Jails (1999 and 2013), Census of Jail Inmates (2005), and Annual Survey of Jails (2000-2014). The report also uses data from the National Inmate Survey (2011-12) to examine the characteristics of adult AIAN inmates held in local jails. The report provides state and national level estimates and examines jail inmates by race and Hispanic origin."
Bureau of Justice Statistics: http://www.bjs.gov/