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List is alphabetical by university/institution

Asia-Pacific Region

University of Melbourne, Library Collections, http://blogs.unimelb.edu.au/librarycollections/

IRELAND

Research Collections (incorporating the Department of Early Printed Books and the Manuscripts & Archives Research Library) the Library of Trinity College, the University of Dublin http://www.tcd.ie/library/manuscripts/blog/ and http://www.tcd.ie/library/epb/blog/
University College Cork, Special Collections, Archives & Repository Services, UCC Library, http://blogs.ucc.ie/wordpress/theriverside/

USA

American Antiquarian Society. Past is Present, http://pastispresent.org
Amherst College, Archives & Special Collections, The Consecrated Eminence, http://consecratedeminence.wordpress.com/
Autry National Center, Libraries and Archives of the Autry,http://blog.theautry.org/
Baylor University, Armstrong Browning Library, http://blogs.baylor.edu/armstrongbrowning/
Baylor University, The Texas Collection, Blogging about Texas: http://blogs.baylor.edu/texascollection/
Boston College Law School, The Daniel R. Coquillette Rare Book Room Blog, http://rarebookroom.blogspot.com/
Bowling Green State University, Music Library and Sound Recordings Archives: http://blogs.bgsu.edu/music/
Brandeis University, Robert D. Farber University Archives and Special Collections, Brandeis Special Collections Spotlight, http://brandeisspecialcollections.blogspot.com/
Brigham Young University, L. Tom Perry Special Collections, http://sites.lib.byu.edu/sc/blog/
Brown University, Digital Production Services, Curio, http://library.brown.edu/dps/curio
Brown University, John Carter Brown Library, JCB Books Speak, http://blogs.brown.edu/jcbbooks/
Buffalo & Erie County Public Library, Grosvenor Rare Book Room, http://grorarebookroom.wordpress.com/
The Center for Jewish History, 16th Street, http://16thstreet.tumblr.com/
Catholic University of America, Rare Books and Special Collections, http://ascendonica.blogspot.com/
Colorado College, Special Collections, CC Special Collections: new acquisitions and more, http://sites.coloradocollege.edu/ccspecialcollections/
Columbia University, Rare Book and Manuscript Library, Out of the Box, https://blogs.cul.columbia.edu/outofthebox/
Congregational Library and Archives, Beacon Street Diary, http://congregationallibrary.org/get-connected/beacon-street-diary
Dartmouth College, Rauner Special Collections Library, http://raunerlibrary.blogspot.com/
Daughters of Charity, Province of St. Louise Archives, Emmitsburg, MD: http://dcarchives.wordpress.com
Daughters of the Republic of Texas Library at the Alamo, Inside the Gates, http://drtlibrary.wordpress.com
Davidson College, Archives & Special Collections, Around the D, http://sites.davidson.edu/aroundthed/
Duke University, David M. Rubenstein Rare Book & Manuscript Library, The Devil's Tale, http://blogs.library.duke.edu/rubenstein/
State Archives of Florida, Florida Memory, http://www.floridamemory.com/blog/
Florida State University Libraries, Special Collections & Archives, Illuminations, https://fsuspecialcollections.wordpress.com/
Folger Shakespeare Library, Washington DC, The Collation: A Gathering of Scholarship from the Folger Shakespeare Library, http://collation.folger.edu/
George Mason University, Special Collections & Archives, Vault 217, http://vault217.gmu.edu
Harvard University, Fine Arts Library, Fine Arts Library Collections, http://blogs.law.harvard.edu/finearts/
Harvard University, Houghton Library, Houghton Library Blog, http://blogs.law.harvard.edu/houghton/
Harvard University, Houghton Library, Modern Books and Manuscripts, http://blogs.law.harvard.edu/houghtonmodern/
Haverford College, Quaker & Special Collections, New & Noteworthy Blog, http://blogs.haverford.edu/special/
The Huntington Library, Art Collections, and Botanical Gardens, Verso, http://huntingtonblogs.org/
Indiana University, Lilly Library, Lilly Library News & Notes, http://www.indiana.edu/~liblilly/blog/
Indiana University Archives, Blogging Hoosier History, https://blogs.libraries.indiana.edu/iubarchives/
Iowa State University Library, Special Collections Department, , http://isuspecialcollections.wordpress.com/
Library Company of Philadelphia, Beyond the Reading Room, http://librarycompany.blogspot.com/
Library of Congress, Prints & Photos Division, Picture This, http://blogs.loc.gov/picturethis/
Library of Virginia, Virginia Newspaper Project, Fit to Print: http://www.virginiamemory.com/blogs/fit-to-print/
Library of Virginia, Prints and Photographs Collection, Multiple Exposure: http://www.virginiamemory.com/blogs/multiple_exposure/
Library of Virginia, Archives, Out of the Box: http://www.virginiamemory.com/blogs/out_of_the_box/
Louisiana State University Libraries, http://hill.blogs.lib.lsu.edu/
Loyola University New Orleans, Special Collections & Archives, Found in the Archives http://library.loyno.edu/blog/?cat=310
Morgan Library & Museum, Morgan Library Blog, http://blog.themorgan.org/
New York Academy of Medicine, Center for the History of Medicine and Public Health, Books, Health, and History, http://nyamcenterforhistory.org/
New-York Historical Society Museum & Library, From the Stacks, http://blog.nyhistory.org/
The New York Public Library, Manuscripts and Archives Division, Archives: Out of the Box, http://www.nypl.org/voices/blogs/blog-channels/archives
The New York Public Library,Rare Books Division, http://www.nypl.org/blog/division/rare-books
New York Society Library, New York, NY: http://nysoclib.org/blog
Northern Illinois University, Rare Books and Special Collections, NIU Rare Books and Special Collections Blog, http://niurarebooks.wordpress.com/ (shut down due to onerous new reporting requirements by my university. --Lynne M. Thomas)
Norwich University Archives & Special Collections, Mining for Old, http://library2.norwich.edu/archivalexcerpts/
The Ohio State University, Hilandar Research Library, Scriptoria Slavica: http://library.osu.edu/blogs/medieval-slavic/new-rcmss-website/
The Ohio State University, Jerome Lawrence and Robert E. Lee Theatre Research Institute, http://library.osu.edu/blogs/theatre-research-institute/
The Ohio State University, Rare Books & Manuscripts Library, : http://library.osu.edu/blogs/rarebooks/
The Ohio State University, University Archives, From Woody's Couch, http://library.osu.edu/blogs/archives/
Ohio University Libraries, @MaggieBoyd1873 Project: http://www.library.ohiou.edu/category/margaret-boyd/
Oregon State University, Special Collections and Archives Research Center, Speaking of History: http://wpmu.library.oregonstate.edu/osu_archives/
Princeton University Library, Graphic Arts Collection, http://blogs.princeton.edu/graphicarts/
Princeton University Library, Rare Books and Special Collections, Notabilia, http://blogs.princeton.edu/notabilia/
Princeton University Library, Rare Books and Special Collections, Rare Book Collections @ Princeton, http://blogs.princeton.edu/rarebooks/
Providence (RI) Public Library, Notes for Bibliophiles, http://pplspcoll.wordpress.com/
Rhode Island Historical Society, Collections, A Lively Experiment, http://rihs.wordpress.com/
Rosenbach Museum & Library, Rosen-blog, http://rosenbach.blogspot.com/
Saint Louis University Libraries Special Collections, Special Collections Currents, http://pius7.slu.edu/special_collections/
San Diego State University, Special Collections and University Archives, , New and Notable, http://library.sdsu.edu/scua/new-notable
San Francisco Public Library, San Francisco, CA: http://sfhcbasc.blogspot.com/
Smithsonian Institution, Smithsonian Collections Blog, http://si-siris.blogspot.com
Smithsonian Institution, Smithsonian Library Blog, http://blog.library.si.edu
Stanford University, Special Collections and University Archives, http://library.stanford.edu/blogs/spec-unbound
Syracuse University, Special Collections Research Center, SCRC Behind the Scenes, http://library-blog.syr.edu/scrc/
Southern Illinois University, Special Collections Research Center, Raiders of the Lost Archives, http://scrc1.wordpress.com/
Southern Methodist University, CUL Digital Collections: http://blog.smu.edu/offtheshelf/
Syracuse University, Special Collections Research Center, "SCRC Behind the Scenes": http://library-blog.syr.edu/scrc/
Miami University Library, Walter Havighurst Special Collections, : http://spec.lib.muohio.edu/home/blog/
Trinity College, Watkinson Library, The Bibliophile's Lair, http://commons.trincoll.edu/watkinson/
University of Alabama, Division of Special Collections, Cool@Hoole, http://apps.lib.ua.edu/blogs/coolathoole/
UC Berkeley, The Bancroft Library, Digital Collections Blog, http://bancroftdigitalcollectionsunit.wordpress.com/
UCLA, William Andrews Clark Memorial Library, The Clog, http://clarklibrary.wordpress.com/
UCLA Library Special Collections, UCLA, UCLA Library Special Collections Blog: http://blogs.library.ucla.edu/special
University of Chicago Library, Special Collections Research Center, Scope Notes, http://lib.typepad.com/scrc/
University of Chicago Library, Special Collections Research Center, News Site, http://news.lib.uchicago.edu/special-collections/
University of Delaware, Special Collections/Manuscripts and Archives Department, http://sites.udel.edu/spec/
University of Houston Special Collections, http://weblogs.lib.uh.edu/speccol/
University of Illinois Library, Non Solus, http://nonsolusblog.wordpress.com/
University of Iowa, Special Collections and University Archives, http://blog.lib.uiowa.edu/speccoll/
University of Kansas, Kenneth Spencer Research Library, Inside Spencer: The KSRL Blog, http://blogs.lib.ku.edu/spencer
University of North Carolina at Chapel Hill, North Carolina Collection: http://blogs.lib.unc.edu/ncm/
University of North Carolina at Chapel Hill, Southern Folklife Collection: http://blogs.lib.unc.edu/sfc/
University of Maryland-College Park, Special Collections and University Archives, https://hornbakelibrary.wordpress.com/
University of Miami, Special Collections, The Mosaic, http://library.miami.edu/specialcollections/mosaic/
University of Michigan Special Collections Library, Beyond the Reading Room, http://www.lib.umich.edu/blogs/beyond-reading-room
University of Michigan, William L. Clements Library, Clements Library Chronicles, http://theclementslibrary.blogspot.com/
University of Missouri Special Collections and Rare Books: http://library.missouri.edu/scriptamanent/
University of North Carolina at Chapel Hill, The Chapel Hill Rare Book Blog, http://www.lib.unc.edu/blogs/rbc/
University of Oklahoma, OU History of Science Collections, http://ouhos.org/
University of Pennsylvania, Rare Book Cataloging at Penn, http://pennrare.wordpress.com/
University of Pennsylvania, Unique at Penn, http://uniqueatpenn.wordpress.com/
University of Puget Sound, Archives & Special Collections, Collins Unbound, http://blogs.pugetsound.edu/collinsunbound/
University of Texas at San Antonio, The Top Shelf http://utsalibrariestopshelf.wordpress.com/
University of Texas at San Antonio, La Cocina Histórica http://lacocinahistorica.wordpress.com/
University of Scranton Weinberg Memorial Library, UofS Library News, http://blogs.scranton.edu/library
University of South Florida, Special Collections, E-Codex, http://www.lib.usf.edu/special-collection-news/
University of Texas at Austin, Harry Ransom Center, Cultural Compass, http://www.utexas.edu/opa/blogs/culturalcompass/
University of Tulsa, McFarlin Library, From McFarlin Tower, http://orgs.utulsa.edu/spcol/
University of Virginia, Albert and Shirley Small Special Collections Library, Notes from Under Grounds http://smallnotes.library.virginia.edu
Villanova University, Falvey Memorial Library, Blue Electrode, http://blog.library.villanova.edu/digitallibrary
Washington University Libraries, Library News for Rare Books, http://wulibraries.typepad.com/rarebooknews/
Wesleyan University, Special Collections & Archives, http://sca.blogs.wesleyan.edu/
Wake Forest University Special Collections & Archives, http://zsr.wfu.edu/special/blog/
Yale University, Beinecke Library, Voices from the Beinecke Library, http://beinecke.library.yale.edu/about/blogs/beinecke-library/
Yale University, Lewis Walpole Library, Recent Antiquarian Acquisitions, http://lewiswalpole.wordpress.com/
Yale University, Lillian Goldman Law Library, Yale Law Library Rare Books Blog, http://library.law.yale.edu/blogs/rare-books

Medieval and Earlier Manuscripts, British Library, http://britishlibrary.typepad.co.uk/digitisedmanuscripts/index.html
Brunel University, Special Collections Blog, http://brunelspecialcollections.wordpress.com/
Cambridge University Library, Incunabula Project Blog, https://inc.blog.lib.cam.ac.uk
Cambridge University Library, Special Collections, https://specialcollections.blog.lib.cam.ac.uk/
Christ's College Library, Cambridge. Treasures at Christ's, http://christstreasures.blogspot.co.uk/
Parker Library, Corpus Christi College, Cambridge. Parker Library, http://theparkerlibrary.wordpress.com/
Special Collections and Archives, Cardiff University, http://scolarcardiff.wordpress.com
Chetham's Library, Manchester, England, http://chethamslibrary.blogspot.com/
Eton College Library, http://etononline.net/collegelibrary/
National Library of Scotland, Rare Books @ NLS, http://blogs.nls.uk/rarebooks/
Bodleian Libraries, Oxford University, Bodleian Ballads, http://balladsblog.bodleian.ox.ac.uk/blog
Bodleian Libraries, Oxford University, The John Johnson Collection: Now and Then, http://johnjohnsoncollectionnowandthen.wordpress.com/
Bodleian Libraries, Oxford University, The Conveyor, http://blogs.bodleian.ox.ac.uk/theconveyor/
Special Collections, University of Bradford, http://specialcollectionsbradford.wordpress.com/
Special Collections, University of Glasgow Library, http://universityofglasgowlibrary.wordpress.com/category/special-collections/
University Archives, University of Glasgow Library, http://universityofglasgowlibrary.wordpress.com/category/archive-services-guas/
Senate House Library, University of London, Historic Collections at Senate House Library, http://senatehouselibraryhistoriccollections.wordpress.com
John Rylands Library, University of Manchester, John Rylands Library Special Collections Blog, http://rylandscollections.wordpress.com/
University of Reading, Beckett, Books & Biscuits: University of Reading Special Collections: http://blogs.reading.ac.uk/special-collections/
University of St Andrews, Special Collections, Echoes from the Vault, http://standrewsrarebooks.wordpress.com/

SWEDEN

Stockholm University Library, Special Collections. I rara vänners lag, http://specialsamlingar.wordpress.com/
Umeå University Library, Special Collections and Archive. Tryckt & otryckt, https://trycktochotryckt.ub.umu.se/

Antiquarian Booksellers' Association list of member booksellers with blogs: http://www.aba.org.uk/links/34-bookseller-blogs-