Before figuring out where to buy vegan condoms, you should make sure you understand what it means when a manufacturer or retailer tells you that they sell vegan condoms. There are efforts to create meaningful definitions and systems for vegan certification but currently there are no internationally, or even federally regulated standards or definitions of what makes a product vegan. This is true for vegan condoms.
The main issue for vegans around condom manufacturing seems to be about the use of casein. Casein is a milk protein that is used in the manufacturing of latex for condoms. Vegans on the whole don’t use milk products or by-products.
There are four latex condoms on the market that don’t use casein in the manufacturing process.
RFSU is the Swedish Association for Sexuality Education, a very old sexual health organization that has a line of condoms which are vegan. The U.S. distributor for RFSU condoms announced in 2009 that they are now certified vegan by the Vegan Action Foundation in America. To find a retailer near you contact the distributor through their website.
Sir Richard's Condoms (buy direct) are available in four styles (thin, ribbed, dotted, and large) and are promoted as being condoms for a cause. For every condom purchased the company donates a condom to people who need access to free condoms. They are specifically working with Partners in Health, distributing condoms in Haiti. None of their condoms contain casein.
Condomi is a large European condom manufacturer that uses cocoa powder instead of casein. Unfortunately these condoms are not currently available in the U.S. or Canada. They were for a time, but I have heard that the manufacturer is now working towards meeting U.S. requirements for sale (this is not a safety issue as I understand it).
Glyde condoms are available in the U.S. from several retailers and they are also vegan. So for now this seems to be your only option.
Another Concern for Vegans?
I also wonder about whether or not vegans need to be concerned about the lubricant in condoms. In most cases, this lubricant will contain ingredients that were, originally, tested on animals. While the condom companies will not have necessarily done this testing, I presume that some vegans would prefer to stick with non-lubricated condoms, to avoid this possibility.