“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.
Post OfficeCountyDates 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 27 Nov 2009 23:28:52.

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Missouri Postal History Society, St. Louis, Missouri.