Recently the Library of Congress made available digital copies of newspaper directories published by George P. Rowell & Co., and N. W. Ayer and Sons.

In the 1869 directory, Colorado is shown to have eleven newspapers, with the Rocky Mountain Herald claiming the largest circulation - 5,000 weekly. The Rocky Mountain News claimed 500 daily and 1,500 weekly subscribers. By 1881 there were over a hundred newspapers; in the early 1900s there were over 400. Then in 1916 the number started going down.

The directories give different information for different years. There is often a summary for the each state; for instance, the 1888 directory gives the number of Democrat, Republican, Greenback, and Prohibitionist voters, as well as a description of the population, geography, manufacturing and agricultural products (p. 605). Each county also has a brief description, as well as each newspaper. That year the Pioneer Press was listed as being published in Akron, Washington County, beginning in 1886. It was 24 by 35 inches, and four pages long. It was edited by D. W. Irwin, and a subscription cost $2.00 (p. 45).

The following table shows the directories available, and provides a link to the first page of Colorado’s listing for each year:

Year/Publisher City listing County listing # Newspapers
1869 (Rowell) p. 116   11
1872 (Rowell) p. 189   19
1874 (Rowell) p. 211   44
1875 (Rowell) p. 230   42
1877 (Rowell) p. 27   44
1880 (Ayer) p. 242 p. 394 81
1881 (Ayer) p. 273 p. 536 106
1882 (Ayer) p. 279 p. 556 128
1883 (Ayer) p. 295 p. 579 148
1884 (Ayer) p. 310 p. 637 (missing) 151
1885 (Ayer) p. 321 p. 652 146
1886 (Ayer) p. 335 p. 674 162
1888 (Ayer) p. 45 p. 605 236
1889 (Ayer) (not yet posted)    
1890 (Ayer) p. 66 (missing) p. 845 281
1893-1894 (Ayer) p. 64 p. 911 312
1897 (Ayer) p. ___ (missing) p. 957 ___
1898 (Ayer) p. 69 p. 963 314
1900 (Ayer) p. 73 p. 999 336
1901 (Ayer) p. 75 p. 1017 349
1902 (Ayer) p. 75 p. 1029 358
1903 (Ayer) p. 77 p. 1041 367
1904 (Ayer) p. 76 p. 1039 379
1905 (Ayer) p. 77   372
1906 (Ayer) p. 82   360
1907 (Ayer) p. 81   363
1908 (Ayer) p. 80   364
1909 (Ayer) p. 82   377
1910 (Ayer) p. 84   402
1911 (Ayer) p. 99   411
1912 (Ayer) (not yet posted)    
1913 (Ayer) p. 94   417
1916 (Ayer) p. 100   398
1919 (Ayer) p. 109   383