County seats are displayed in UPPER CASE. Note: Information about zip codes, territorials, markings, etc. have been moved to detail pages for places that have links.
Post Office County Dates of Service
Zadock
Stoddard
1891-1916
Zalma
Bollinger
1890-Present
Zanoni
Ozark
1898-1927, 1930-Present
Zaring
Camden
1899-1909
Zealot
Saint Clair
1880
Zebra
Camden
1886-1935
Zeitonia
Wayne
1887-1906
Zell
Ste. Genevieve
1881-1922
Zenar
Webster
1900-1909
Zenda
Douglas
1900-1910
Zephyr
Bollinger
1908-1911
Zero
Laclede
1886
Zeta
Stoddard
1895-1896, 1907-1936
Zettonta
Wayne
1887-1906
Zif
Stoddard
1860-1864
Zig
Adair
1870-1908
Zinc
Benton
1900
Zincite
Jasper
1885-1918
Zion
Henry
1856-1862, 1868
Zion
Madison
1880-1921, 1930-1964
Zoar
Gasconade
1898-1901
Zodiac
Vernon
1882-1914
Zola
Schuyler
1891-1904
Zonker
Douglas
1893-1896
Zora
Benton
1887-1931
Zulu
Vernon
1885-1886
Zuray
Shelby
1894
Zwanzig
Morgan
1892-1901
28 Post Offices entered in the letter “Z”
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Updated on 27 Nov 2009 23:28:54.
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Missouri Postal History Society, St. Louis, Missouri.