Obenstrohe (Municipality / Lower Saxony)
Ober Haaren (Municipality / Lower Saxony)
Ober Ochtenhausen (Municipality / Lower Saxony)
Oberg (Municipality / Lower Saxony)
Oberhammelwarden (Municipality / Lower Saxony)
Oberhausen (Municipality / Lower Saxony)
Oberhausen bei Bremerhaven (Municipality / Lower Saxony)
Oberhaverbeck, Kreis Soltau (Municipality / Lower Saxony)
Oberheide (Municipality / Lower Saxony)
Oberheise, Kreis Wesermünde (Municipality / Lower Saxony)
Oberholsten (Municipality / Lower Saxony)
Oberhütte, Harz (Municipality / Lower Saxony)
Oberlangen (Municipality / Lower Saxony)
Oberlangen (Municipality / Lower Saxony)
Oberlethe I (Municipality / Lower Saxony)
Obermarschacht (Municipality / Lower Saxony)
Oberndorf, Oste (Municipality / Lower Saxony)
Obernfeld (Municipality / Lower Saxony)
Obernheide (Municipality / Lower Saxony)
Obernholz (Municipality / Lower Saxony)
Obernjesa (Municipality / Lower Saxony)
Obernkirchen (Town / Lower Saxony)
Obernkirchen (Municipality / Lower Saxony)
Obernwöhren (Municipality / Lower Saxony)
Oberode (Municipality / Lower Saxony)
Oberschlochtern (Municipality / Lower Saxony)
Obershagen (Municipality / Lower Saxony)
Obersickte (Municipality / Lower Saxony)