If you want more information before choosing a dating service, I've included more details as well as some additional choices.
VeggieConnection.com is the best vegetarian dating site that I found. It’s a great looking site that has more members than the competition.
The members are made up of vegetarians, vegans, raw-foodists, and macrobiotic diet followers.
You can define everything you’re looking for – friends or romance, age, diet, height, body type, race, education, religion and more.
These words are on the home page:
"If you support animal rights, enjoy a raw foods, vegetarian or vegan diet, locally grown, organic foods, free range, organic meat (if you eat meat), being environmentally conscious in general, earth stewardship, permaculture, sustainable living, alternative energy sources, bicycling over driving, organic gardening, green groups, green friends then you are in the right place at the right time"
The following vegetarian / vegan dating sites are not as good because they don't have as many members right now, but over time some of them will likely grow their memberships.
http://www.veggiedate.org - This site is for lacto vegetarians, ovo vegetarians, fish vegetarians and vegan singles. Whether you're a raw food vegan or raw foodist, you're welcome to join veggiedate.org. The site is skimpy on members, but it’s worth a look if you live in a big city or you’re open to relocating for love.
http://www.vegconnect.com - This vegan and vegetarian dating site is 100% free. Right now the membership base is very small, but you can still check it out if you like.
http://vegetariandating.com - Same theme here... Like the other vegetarian dating sites, this one is short on members. Very short. If you’re ok with starting a long distance romance, you can check out the site anyway.
http://www.veggieromance.com - Veggie Romance is a site for vegan singles, vegetarian singles, fruitarians, and those following a raw food or macrobiotic diet.