| Placename | NWT Provisional District | Sec | Twp | Rge | W Meridian |
| Ohlen | Assiniboia East/Est | 30 | 18 | 2 | W 2 |
| 1887 Location. Ohlen does not exist anymore. The 1901 census area is West of Hazelcliffe 27-18-33-W1, SE of Stockholm 25-19-3-W2, SW of Esterhazy 28-19-1-W2 and SW of Tantallon 16-18-32-W1.
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| Old Wives Creek | | | | | |
| Old Wives Creek Tsp 13-Rge 4-W3 is included in the 1901 census under the placename Chaplin.
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| Old Wives Lake | Assiniboia West/Ouest | | | | |
| Old Wives P.O. est 1912 14-14-30-W2. (Current location Old Wives is 25-14-30-W2) Old Wives Creek HBC trading post est. 1868.
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| One Arrow | | | | | |
| One Arrow, Batoche is enumerated at 1901 census placenames of Duck Lake Agency.
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| Onion Lake | Saskatchewan | | 54 | 27 | W 3 |
| 1890 location. (Present day location 6-55-27-W3) HBC trading post est. 1887 through to 1928. Mentioned on schedule 2 are Onion Lake, Battleford Village, Cold Lake, Duck Lake and English River.
|
| Osler | Saskatchewan | 20 | 39 | 4 | W 3 |
| 1891 and present location. This 1901 census area includes Tsp 39-Rge 3,4,5, 8,9-W3. There are a few unincorporated villages mentioned: Neuhorst 31-39-5-W3, Osterwick 5-39-5-W3, Karrillofka 14-39-8-W3, Bahadanofka 20-39-8-W3, Pakrafka 4-39-9-W3. On schedule 1, at 39-8-3 Kerrillovokla, Karrillofka, Kerrllovka is spelled out on p 6,7,8 differently.
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| Osterwick | | | | | |
| 5-39-4-W3 Osterwick, an unincorporated village is located on 1901 census at placename Osler
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| Otthon | Assiniboia East/Est | 36 | 24 | 5 | W 2 |
| 1896 Location. Later locations 14-24-5-W2, 26-24-5-W2 Otthon does not exist anymore. The 1901 census location is SW of Rhein 23-27-2-W2 and NE of McKim 9-24-5-W2.
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| Oxbow | Assiniboia East/Est | 23 | 3 | 2 | W 2 |
| 1892 and present day location. Oxbow at 23-3-2-W2 is on the 1901 census and is also the closest present day location to the 1901 census placename of Dalesboro which does not exist anymore.
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