“O” Post Offices in Missouri

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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. (04/15/2001)

Post Office	County	Dates of Service
O’Day	Barry	1886-1891
O’Fallon	Saint Charles	1859-Present
O’Neill	Saint Louis	1888-1891, 1900-1901
Oak	De Kalb	1894-1906
Oak City	Grundy	1871-1872
Oak Dale	Shelby	1878-1905
Oak Grove	Jackson	1840-1862, 1867-Present
Oak Hill	Crawford	1870-1944
Oak Mound	Ozark	1888-1932
Oak Point	Randolph	1831-1838
Oak Point	Moniteau	1856-1865
Oak Ridge	Cape Girardeau	1854-1862, 1865-Present
Oakdale	Marion	1834-UNK
Oakdale	Shelby	?-1862
Oakfield	Franklin	1847-1895
Oakhill	Gasconade	1857-1870
Oakhurst	Miller	1862-1871
Oakland	Pulaski	1841-1849
Oakland	Laclede	1849-1863, 1865-1955
Oakley	Lewis	1851-1855
Oakley	Macon	1884-1888
Oakside	Shannon	1890-1943
Oakton	Barton	1897-1901
Oakville	Saint Louis	1841-1852, 1876-1907
Oakwood	Saint Charles	1858-1865
Oakwood	Marion	1887-1953
Oasis	Taney	1906-1951
Oates	Reynolds	1887-1920
Oberlin	Nodaway	1888
Oby	Crawford	1910-1921
Oceola	Jefferson	1837-1838
Ocie	Ozark	1908-1967
Octa	Dunklin	1903-1908
Odale	Barton	1881-1884
Odam	Putnam	1882
Odd	Texas	1884, 1892-1898
Odessa	Lafayette	1879-Present
Odin	Wright	1882-1915
Oermann	Jefferson	1888-1955
Ogden	Scott	1836-1840
Ogden	New Madrid	1839-1870, 1884-1893
Ogles Mills	Andrew	1858-1861
Ohio	Andrew	1851-1852
Ohio	Saint Clair	1878-1941
Ohio City	Mississippi	1846-1849
Ohio Mills	Andrew	1856-1860
Ohlman	Reynolds	1907-1915
Oil Spring	Osage	1866-1867
Ojibway	Wayne	1901-1907, 1924-1940
Okete	Lincoln	1887-1907
Oland	Harrison	1897-1902
Olathe	Douglas	1895-1908
Old Alexandria	Lincoln	1852-1880
Old Appleton	Cape Girardeau	1917-Present
Old Buck Station	Jefferson	1858
Old Dutch	Jefferson	1872-1882
Old Franklin	Howard	1830, 1851-1854, 1888-1903
Old Jefferson	Saline	1838-1845
Old Mills	Washington	1867-1868
Old Mines	Washington	1827-1861, 1863-1969
Old Monroe	Lincoln	1863-Present
Old Orchard	Saint Louis	1886-1901
Olden	Howell	1883-1951
Oldfield	Christian	1900-Present
Olean	Miller	1885-Present
Olga	Webster	1890-1901
Olga	Christian	1901-1906
Olga	Douglas	1912-1918
Olinger	Lawrence	1902-1917
Olio	Macon	1860-1868
Olive	Dallas	1884-1907
Olive Branch	Holt	1850-1853, 1855-1859
Olive Hill	Johnson	1910-1912
Olivers Prairie	Newton	1841-1858
Olivette	Saint Louis	1908-1917
Olney	Lincoln	1876-Present
Olympia	Cedar	1899-1907
Omaha	Putnam	1860-1908
Omba	Douglas	1892-1920
Omega	Wright	1888-1892, 1895-1905
Omega	Laclede	1894
Omelet	Audrain	1854-1855
Omer	Cedar	1889-1907
Omo	Douglas	1899-1904
Oneida	Harrison	1884-1886
Ongo	Douglas	1897-1949
Onie	Dent	1895-1897
Only	Stone	1899-1900
Only	Camden	1907-1919
Ono	Grundy	1876-1881
Onyx	Pulaski	1836-1841
Onyx	Washington	1892-1895
Opel	Sullivan	1882-1902
Oran	Scott	1882-Present
Orange	Benton	1846-1851, 1854-1856, 1879-1880
Orange	Lawrence	1894-1903
Orchard Farm	Saint Charles	1894-1953
Orchard Grove	Mc Donald	1878
Orchard Point	Shannon	1876-1878
Orchard Switch	Carter	1890-1891
Orchid	De Kalb	1880-1900
Ore	Cass	1882-1906
Orearville	Saline	1875-1903
OREGON	Holt	1843-Present
Orel	Sullivan	1891-1894
Origanna	Laclede	1901-1920
Oriole	Cape Girardeau	1879-1905
Orion	Daviess	1856-1858
Orion	Henry	1870-1871
Orion	Saint Clair	1871
Orla	Laclede	1880-1954
Orleans	Polk	1846-1895
Orlinda	Linn	1879-1885, 1888-1898, 1900-1902
Oronogo	Jasper	1874-Present
Orr	Webster	1858-1863
Orrick	Ray	1873-Present
Orrsburg	Nodaway	1881-1902
Orrville	Saint Louis	1868-1895
Orton	Ray	1899-1900
Osa	Barry	1895-1908
Osage	Crawford	1836-1886
Osage Beach	Camden	1935-Present
Osage Bend	Cole	1908-1921
Osage Bluff	Cole	1858-1864, 1866-1912
Osage City	Cole	1856-1962
Osage Ferry	Gasconade	1828-1832
Osage Fork	Laclede	1854-1861
Osage Iron Furnace	Camden	1872
Osage Iron Works	Camden	1872-1931
Osaka	Taney	1905-1917
Osborn	De Kalb	1858-Present
Oscar	Texas	1880-1915
OSCEOLA	Saint Clair	1842-Present
Oseola	Rives	1839-1842
Osgood	Sullivan	1888-1965
Oshawa	Osage	1867-1874
Osiris	Cedar	1901-1906
Osiris	Cedar	1901-1906
Oskaloosa	Barton	1894-1953
Osta	Ozark	1900-1902, 1907-1914
Osterville	Caldwell	1869-1874
Oswald	Atchison	1894-1901
Oswego	Douglas	1905-1922
Otis	Polk	1899-1901
Otley	Webster	1904-1906
Oto	Stone	1877-1913
Otsego	Ray	1851-1871
Otter Creek	Wayne	1853-1876, 1885-1888
Otterville	Cooper	1848-Present
Ottomer	Douglas	1879-1909
Oval	Harrison	1897-1903
Overland	Saint Louis	1910-1925
Overton	Cooper	1864-1944
Ovid	Cass	1857-1860
Ovid	Ray	1888-1904
Owasco	Sullivan	1858-1861, 1866-1919
Owen	Lincoln	1883-1915
Owenmont	Ripley	1911-1915
Owens Mills	Osage	1876-1887, 1889-1922
Owens Station	Saint Louis	1834-1843
Owensville	Clay	1839-1844
Owensville	Gasconade	1856-Present
Owington	Warren	1855
Owl Creek	Knox	1872-1877
Owlcreek	Saint Francois	1901-1905
Owls Bend	Shannon	1923-1955
Owsley	Johnson	1877-1906
Oxford	Gentry	1859-1861
Oxford	Worth	1861-1905
Oxly	Ripley	1900-Present
Oyer	Saint Clair	1882-1935
Oyster	Lewis	1856-1876
Ozark	Greene	1840-1861
OZARK	Christian	1861-Present
Ozark Beach	Taney	1919-1959
Ozark Iron Works	Phelps	1873-1882
Ozark Mills	Iron	1871-1887
Ozora	Ste. Genevieve	1900-1914

178 Post Offices entered in the letter “O”

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Updated on 26 May 2008 22:18:55.