The United States Census of 1880, conducted during June 1880, determined the resident population of the United States to be 50,189,209 - an increase of 30.2 percent over the 1870 Census.<br><br>The 1880 census contains records of families living in the United States and its territories during the latter half of the Great Westward Migration. Thirty-eight states were included in the 1880 census, plus the territories of: Arizona, Dakota, Idaho, Montana, New Mexico, Utah, Washington, and Wyoming. Non-organized Alaska was also enumerated, but the "Indian Territory" (now Oklahoma) was not enumerated for non-Indians.<br><br>联邦普查员记录当天关于每户每个人的信息。调查人员可能于较后日期登门看访，但他收集的信息应该是关于普查当日在家的人。基本普查查点单位是县。每个县被分为几个计数区，每个计数区由一位计数员负责。填妥的表格被发送到华盛顿商务部的人口普查办公室。<br><br>联邦人口普查通常是可靠的，依靠线人的知识和普查员的细心。资料可能已经由任何一个家庭成员或邻居给普查员。有些信息可能不正确，或者故意伪造。
