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Most titles are housed in the Main Library’s Magazines and Newspapers Department; however Genealogy magazines are shelved in the Genealogy & Local History Department; magazines for children are in the Children’s Learning Center; and periodicals published by the Government Printing Office can be found in the Information & Reference Department.. The majority of these are reference only; however, the Magazines and Newspaper Department maintains a collection of circulating titles.
All library branches have circulating collections of popular magazines.
- O at home
- O : the Oprah magazine
- Observer (Ohio Veterinary Medical Association)
- Odyssey
- Off-road
- OfficePro
- The Official Xbox magazine
- Ogonek
- Ohio
- Ohio archaeologist
- Ohio beverage monthly
- Ohio chess bulletin
- Ohio Civil War genealogy journal
- Ohio engineer
- The Ohio farmer
- Ohio game & fish
- Ohio genealogy news
- Ohio journal of science
- Ohio nurses review
- Ohio records and pioneer families
- Ohio schools
- Ohio State Bar Association report
- Ohio state parks
- Ohio Valley history
- Ohioana quarterly
- OhioDance newsletter
- Ohio's last frontier
- The Oil and gas journal
- Old Fort news
- Old Lawrence reminiscences
- Old Pike post
- Old-house interiors
- Old-house journal
- Omega : journal of death and dying
- On the trail
- The onion
- Online
- Opera news
- Orange County Genealogical Society
- Order of the Founders and Patriots of America bulletin
- Oregon historical quarterly
- The Organ
- Organic gardening
- Organic style
- Orientations
- Origins (Washington, D.C.)
- Orion (Orion Society)
- Ornament
- L'Osservatore romano
- Our heritage (San Antonio, Tex.)
- Our heritage (West Union, Ohio)
- Our name's the game
- Our Ohio
- Our Sunday visitor
- Out
- Outdoor America
- Outdoor life
- Outdoor photographer
- Outlook (American Association of University Women)
- Outside
- Owen County, Indiana magazine of history & genealogy
- Owl
- Oxford American
- Oxygen
- Ozar'kin