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Although the majority of the titles are housed in the Main Library’s Magazines and Newspapers Department, you’ll find a circulating collection of popular magazines in the Popular Library and all the branches. Genealogy magazines are shelved in the Genealogy & Local History Department, magazines for children are kept in the Children’s Learning Center, and periodicals published by the Government Printing Office can be found in the Information & Reference Department. With the exception of the magazines in the Popular Library and the branches, all material in the departments is reference only, and cannot be checked out.
- O at home
- O : the Oprah magazine
- OAH newsletter
- Observer (Ohio Veterinary Medical Association)
- Occupational health and safety
- Oceania
- October
- Ode
- Odyssey
- Off-road
- OfficePro
- Officer review
- The Official Xbox magazine
- Ogonek
- OGS genealogy news
- OHA newsletter
- Ohio
- Ohio archaeologist
- Ohio beverage journal
- Ohio chess bulletin
- Ohio Civil War genealogy journal
- Ohio contractor (1983)
- Ohio employment law letter
- Ohio engineer
- The Ohio farmer
- Ohio game & fish
- Ohio geology
- Ohio high magazine
- Ohio journal of science
- Ohio lawyer
- Ohio media spectrum
- 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 time radio digest
- Old-house interiors
- Old-house journal
- Oldenburgische Familienkunde
- O'Lochlainns personal journal of Irish families
- Omega : journal of death and dying
- On the trail
- Onearth
- The onion
- Online
- Oper
- Opera
- Opera news
- The Opera quarterly
- Opernwelt
- Opus
- Oral history recorder
- The Oral history review
- Orange County Genealogical Society
- Orchids
- Order of the Founders and Patriots of America bulletin
- Oregon Genealogical Society quarterly
- Oregon historical quarterly
- The Organ
- Organic gardening
- Organic style
- Organizational dynamics
- Oriental art
- Orientations
- Origins (Buckinghamshire, England)
- Origins (Newberry Library)
- Origins (Washington, D.C.)
- Orion (Orion Society)
- The Orlando sentinel
- Ornament
- Orthodox observer
- Osnabrücker familienforschung
- L'Osservatore romano
- Ottagono
- Oud Holland
- Our children
- Our Daily Bread newsletter
- Our Harrison heritage
- Our heritage (Corbin, Ky.)
- Our heritage (San Antonio, Tex.)
- Our heritage (West Union, Ohio)
- Our name's the game
- Our Ohio
- Our Sunday visitor
- Our week
- Out
- The out traveler
- Outdoor America
- Outdoor life
- Outdoor photographer
- Outlook (American Association of University Women)
- Outlook (Cincinnati, Ohio)
- Outside
- Over the back fence
- Over the front
- Over the years
- Overland journal
- Overland review
- Owen County Historical Society newsletter
- Owen County history and genealogy
- Owen County, Indiana magazine of history & genealogy
- Owl
- Oxford American
- Oxford art journal
- Oxfordshire family historian
- Oxygen
- Ozar'kin