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Oste is an Italian-language occupational surname literally meaning "innkeeper". Oste may also be the Swedish surname Öste without diacritics. Notable people with the surnames include:
- Joseph Julian Oste, bishop of the Roman Catholic Diocese of Rehe, China, 1948–1971
- Nemesi Marqués Oste (born 1935), Catholic priest, the personal representative to Andorra of the Bishop of Urgell from 1993 to 2012