IDGenWeb Resource Library

IDAHO MAPS SERIES:

A Historical View Through the Eyes of the U.S. Census

Idaho Maps offers historical and pictorial perspectives of its rich Idaho’s past. This section is a peripheral look through the U.S. Census, and what took place during that decadal era.

U.S. Census, 1920


Original Census Map
Created by Elaine Johnson © 1998

The 1920 census incurred 21 new counties since the previous decadal enumeration to its present-day borders; though there had been few previous counties who may had their borders realigned in the next few years, such as Ada, Bannock, Butte, Caribou, Custer, Elmore, Franklin, Oneida, and Owyhee counties, due to population adjustments.

The U.S. Census Bureau reported that Idaho’s population in 1920 was 431,866, which was an increase by 25 percent from the previous enumeration. Today Idaho’s 44 counties remained intact since this census had been taken.

Census Map
Table of Content

The following table below is associated by groups (in color) to the year to which the county was created on.

(1) Bonneville (7 Feb 1911)
(2) Clearwater (27 Feb 1911)
(3) Adams (3 Mar 1911)
(4) Lewis (3 Mar 1911)

(5) Franklin (20 Jan 1913)
(6) Gooding (28 Jan 1913)
(7) Minidoka (28 Jan 1913)
(8) Power (30 Jan 1913)
(9) Madison (18 Feb 1913)
(10) Jefferson (18 Feb 1913)
(11) Benewah (23 Jan 1915)
(12) Boundary (23 Jan 1915)
(13) Teton (26 Jan 1915)
(14) Gem (15 Mar 1915)

(15) Butte (6 Feb 1917)
(16) Camas (6 Feb 1917)
(17) Valley (26 Feb 1917)
(18) Payette (28 Feb 1917)

(19) Clark (1 Feb 1919)
(20) Jerome (8 Feb 1919)
(21) Caribou (11 Feb 1919)

Additional Census Statistics

To see below how Idaho had fair since the 1920’s until the last census enumeration:

1930: 445.032
1940: 524,873
1950: 588.637
1960: 667,191
1970: 712.567
1980: 943.935
1990: 1.006.749
2000: 1,293,953
2010: 1,567,582

Original Works © Elaine Johnson 1996-1998 Historical Works © Matthew D. Friend 2017