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
Jack
Dent
1905-1954
Jack’s Creek
Texas
1860-1863
Jacket
Mc Donald
1911-1930
Jackman Mills
Howard
1884-1894
Jacks Fork
Texas
1849-1859, 1869-1872, 1890-1899
Jacks Fork
Shannon
1917-1954
JACKSON
Cape Girardeau
1811-Present
Jackson Court House
Jackson
1827-Present
Jackson Point
Holt
1850-1854
Jackson’s Corners
Sullivan
1856-1876
Jackson’s Station
Daviess
1871-1882
Jacksonville
Randolph
1837-1840, 1859-Present
Jacobs
Phelps
1851
Jacobs
Pike
1851
Jacobston
Crawford
1878-1910
Jadwin
Dent
1875-Present
Jakes Prairie
Gasconade
1830-1875
Jakes Prairie
Crawford
1875-1933
James Bayou
New Madrid
1838-1842
James Bayou
Mississippi
1854-1856, 1860-1863, 1866-1894
Jameson
Daviess
1871-Present
Jamesport
Daviess
1857-Present
Jamestown
Saint Louis
1820-1826
Jamestown
Buchanan
1839-1841
Jamestown
Andrew
1841-1850
Jamestown
Moniteau
1850-Present
Jamesville
Stone
1895-1922
Jandon
Cass
1892-1898
Jane
Mc Donald
1882-1966
Japan
Lafayette
1855-1857
Japan
Franklin
1860-1868, 1887-1908
Jarvis
Jefferson
1888-1900
Jasmine
Adair
1880-1886
Jasper
Jasper
1840-1843, 1857-1863, 1867-1870, 1872-Present
Java
Ste. Genevieve
1894
Jay
Harrison
1856-1871
Jaydee
Saint Francois
1899-1910
Jaywye
New Madrid
1941-1966
Jedds
Clay
1884
Jeff
Oregon
1884-1914
Jefferson
Saline
1820-1825
Jefferson Barracks
Saint Louis
1828-1855, 1858-1875, 1877-1901
JEFFERSON CITY
Cole
1823-Present
Jefferson Mills
Jefferson
1850-1861
Jeffrey
Reynolds
1868-1869
Jefftiesburgh
Franklin
1857-1942
Jenkins
Barry
1883-Present
Jenkins Bridge
Saint Clair
1849-1863
Jenkins Creek
Jasper
1851-1852, 1867-1882
Jennings
Saint Louis
1874-1901
Jericho
Laclede
1856-1863, 1866-1873
Jericho
Cedar
1882-1885
Jerico
Cedar
1885-1905
Jerico Springs
Cedar
1905-Present
Jerome
Phelps
1867-1868, 1870-1872, 1910-2004
Jerome
Carter
1884-1888
Jersey
Osage
1886-1903
Jessamine
Ralls
1896-1903
Jewett
Madison
1872-1873, 1877-1948
Jim
Clark
1877-1884
Jimtown
Schuyler
1893-1904
Joanna
Ralls
1895-1912
Job
Oregon
1892-1906
Jobe
Oregon
1848-1863, 1867-1888
Jody
Taney
1904-1906
Johns Branch
Audrain
1855-1878
Johns Mills
Christian
1888-1893
Johns Mills
Douglas
1893-1934
Johnson
Macon
1868-1871
Johnson City
Saint Clair
1871-1904
Johnson’s
Washington
1849-1852
Johnson’s Mill
Dade
1875-1876
Johnstons Mills
Reynolds
1871
Johnstown
Cass
1853-1856
Johnstown
Bates
1856-1863, 1865-1916
Jolly
Newton
1898-1903
Jonca
Ste. Genevieve
1880-1906
Jones
Cooper
1824-1825E, 1828-1831E
Jones
Warren
1898-1908
Jones Point
Holt
1858-1863
Jones Tan Yard
Callaway
1828-1874
Jones’ Creek
Newton
1838-1859, 1869-1870
Jonesboro
Saline
1828-1840, 1843-1866, 1872-1873
Jonesburg
Montgomery
1893-Present
Jonesburgh
Montgomery
1868-1893
Jonesville
Cass
1859-1862, 1868-1875
Joplin
Jasper
1871-1872, 1877-Present
Joplin City
Jasper
1872-1877
Jordan
Scotland
1871-1875
Jordan
Macon
1881-1887
Jordan
Hickory
1906-1955
Josephville
Saint Charles
1875-1910
Joy
Texas
1887-1889
Joy
Dent
1890-1954
Judd
Carroll
1898-1901
Juddville
Washington
1891-Present
Judge
Osage
1914-1922
Judson
Sullivan
1861-1905
Judy’s Gap
Hickory
1847-1850
Julesburg
Schuyler
1883-1906
Julien
Newton
1859
Junction City
Greene
1878-1888
June
Newton
1900-1905
Juvenile
Christian
1868-1869
104 Post Offices entered in the letter “J”
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Updated on 27 Nov 2009 23:28:50.
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Missouri Postal History Society, St. Louis, Missouri.