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For years now, I've just been re-using an old Ulrich<http://ulrichsweb.serialssolutions.com>'s estimate of about *25,000* for the total number of active peer-reviewed journals. Prompted by a recent query from someone, I've checked again, and -- unless I've made a mistake in my search -- the number now seems to have doubled to *55,311*. The parameters I used to get this figure were (1) Active, (2) Journal, (3) Academic/Scholarly, (4) Refereed/Peer-reviewed, A further breakdown shows that of these *55,311* active peer reviewed journals, *23,527* (*43%*) are available online *9,354* (*17%*) are indexed in Thomson-Reuters-ISI's Journal Citation reports *6,962* (*13%*) are open access journals (freely available online) (Gold OA, presumably not including Hybrid Gold). *769* (*11%*) of the 9,354 Thomson-Reuters-ISI-indexed journals are open access journals -- According to the last estimate of journals indexed by SHERPA/ROMEO (which does not include all the journals indexed by Ulrichs, but does include most of the top journals indexed by Thomson-Reuters-ISI): *60%* of journals recognize the author's right to provide immediate, un-embargoed open access upon self-archiving their final drafts in their institutional repositories. -- It would be helpful if others could check and confirm these figures. Stevan Harnad