Zero is the first of ten symbols — the digits — with which we are able to represent any of an infinitude of numbers. Zero is also the first of the numbers which we must represent. Yet zero, first of the digits, was the last to be invented; and zero, first of the numbers, was the last to be discovered.
Constance reid, From Zero to Infinity
- Chilton County, Alabama
- Cobb County, Georgia
- Dubuque County, Iowa
- Anoka County, Minnesota
- Chisago County, Minnesota
- Dakota County, Minnesota
- Hennepin County, Minnesota
- Ramsey County, Minnesota
- Washington County, Minnesota
- Adams County, Washington
- Asotin County, Washington
- Benton County, Washington
- Chelan County, Washington
- Clallam County, Washington
- Clark County, Washington
- Columbia County, Washington
- Cowlitz County, Washington
- Douglas County, Washington
- Ferry County, Washington
- Franklin County, Washington
- Garfield County, Washington
- Grant County, Washington
- Grays Harbor County, Washington
- Island County, Washington
- Jefferson County, Washington
- King County, Washington
- Kitsap County, Washington
- Kittitas County, Washington
- Klickitat County, Washington
- Lewis County, Washington
- Lincoln County, Washington
- Mason County, Washington
- Okanogan County, Washington
- Pacific County, Washington
- Pend Oreille County, Washington
- Pierce County, Washington
- San Juan County, Washington
- Skagit County, Washington
- Skamania County, Washington
- Snohomish County, Washington
- Spokane County, Washington
- Stevens County, Washington
- Thurston County, Washington
- Wahkiakum County, Washington
- Walla Walla County, Washington
- Whatcom County, Washington
- Whitman County, Washington
- Yakima County, Washington