C
| Publisher | Website | ISBN prefix |
| CALYX Books | www.proaxis.com/calyx/ | 0-934971 |
| CareTrust Publications | www.comfortofhome.com | 0-966476 |
| Carousel Press | www.carousel-press.com | 0-917120 |
| Centipede Press | www.centipedepress.com | 1-933618 |
| Channel Photographics | www.channelphotographics.com | 0-9766708, 1-890310, 0-9773399 |
| Child Heroes Publishing | www.childheroespublishing.com | 0-9746568 |
| Children's Book Press | www.childrensbookpress.org | 0-89239 |
| Chin Music Press | www.chinmusicpress.com | 0-9741995 |
| Cinco Puntos Press | www.cincopuntos.com | 0-938317, 1-933693 |
| City Lights Publishers
City Lights Foundation Books Four Seasons Foundation Grey Fox Press |
www.cincopuntos.com | 0-87286, 0-912516, 88-7218
1-931404 0-87704 0-87704, 0-912516 |
| Classical Comics | www.classicalcomics.com | 1-906332 |
| Cleis Press | www.cleispress.com | 0-939416, 1-57344 |
| Coffee House Press | www.coffeehousepress.org | 0-915124, 0-918273, 1-56689 |
| Common Courage Press | www.commoncouragepress.com | 0-9628838, 1-56751 |
| Contrasto | www.contrastobooks.com | 88-6965, 88-86982, 88-89032 |
| Copper Canyon Press
American Poetry Review Ausable Press |
www.coppercanyonpress.org | 0-914742, 0-9663395, 0-9718981, 0-9776395, 1-55659
0-9663395, 0-9776395 0-9672668, 1-931337 |
| Coteau Books | www.coteaubooks.com | 1-55050 |
| Counterpoint, Soft Skull Press, Sierra Club Books | www.counterpointpress.com | 1-59376, 1-58243, 1-887178, 0-9796636, 1-933368, 1-932360, 1-84354 |
| Come & Get It Publishing | 0-9653042 | |
| Craving Wellness/Clean Plates NYC | cravingwellness.com | 0-9821862 |
| CSA Word | www.csaword.co.uk | 1-904605, 1-906147, 1-934997 |
| Cricket Books | www.cricketmag.com | 0-8126 |
| Curbstone Press | www.curbsidemedia.org | 0-915306, 1-880684, 1-931896 |
D
| Publisher | Website | ISBN prefix |
| "Da Capo Press
Da Capo Lifelong Books |
www.perseusbooks.com/dacapo | 0-201, 0-3064, 0-3067, 0-3068, 0-7382, 0-938289, 0-946771, 0-9627613, 1-55561, 1-58097
1-873376, 1-882810, 1-885119 |
| Demos Medical Publishing | www.demosmedpub.com | 1-932603, 1-888799, 0-9399957 |
| Dewi Lewis Media | www.dewilewismedia.com | 0-9546843, 1-905928 |
| Dewi Lewis Publishing | www.dewilewispublishing.com | 0-948797, 1-899235, 1-904587, 960-8744 |
| DiaMedica | 1-0-9793564 | |
| DiscoverGuides | 0-942053 | |
| The Disinformation Company | www.disinfo.com | 0-9664100, 0-9713942, 0-9729529, 1-932857, 1-934708 |
| Dzanc Books
Black Lawrence Press OV Books |
www.dzancbooks.org | 0-9793123
0-9768993, 0-9815899 0-9767177 |