The following symbols can be found on food products and certain non-food items like soaps, etc. Each certifying organization carefully inspects the ingredients, machinery and processing methods to make sure no unclean animals, as stated in Lev 11 & Deut 14, are used. It is not possible to simply read the ingredients to determine if a product is Scripturally clean. While the ingredient label may not list an unclean ingredient, that does not mean an unclean animal by-product was not used in the processing. For example, if a product lists "natural flavour" as an ingredient, the flavour could be derived from cats, whales, beavers, etc. Those animals are indeed "natural," but they are not kosher (Scripturally clean). If, however, "natural flavours" is listed, but there is a kosher symbol on the item, it would mean the natural flavour was not from an unclean source.
The Union of Orthodox Jewish Congregations
The Organized Kashrus Laboratories
Star-K Kosher Certification
Star-D
KOF-K Kosher Supervision
The Heart "K" Kehila Kosher
The "RCC" Community Kashrus Division of the Rabbinical Council of California
Vaad Harabanim of Greater Seattle
Kosher Supervision of America
Vaad Hoeir of Saint Louis
The Vaad Hakashrus of Denver
The Texas K & International Kosher Supervision & the Chicago Rabbinical Council have merged into one company.
Vaad Hakashrus of Dallas - The "DK"
K'hal adath Jeshurun (Breuer's)
Atlanta Kashruth Commission
National Kashrut
The "MK" Manchester Beth Din
Montreal Vaad Hair
Vaad Hakashrus of Massachusetts
Kashruth Council of Toronto
Tri-State Kashruth, Vaad Hoer of Cincinnati
The "CHOF KOSHER"
Vaad HaRaBONIM of Florida
Orthodox Vaad of Philadelphia
The California "K" Kehilla Kosher (Igud Hakashrus of Los Angeles)
Rabbinical Council of Orange County & Long Beach
Vaad HaKashrus of the Five Towns
Rabbinic Administrator of Upper Midwest Kashrut
The "K-COR" Vaad Harabonim of Greater Detroit & Merkaz
The "Sefer Torah-Kasher" The Vaad Harabbonim of Flatbush
Bais Din of Crown Heights
Kashruth of The Central Rabbinical Congress
Orthodox Rabbinical Council of British Columbia
aGUDaH The Beth Din Zedek of agudath Israel
The London Beth Din Court of the Chief Rabbi
KEDaSSIa Kedassia, The Joint Kashrus Committee of England
Glatt Kosher &endash; Nevei Achiezer
Bais Din Tzedek of the Eida Hachareidis of Jerusalem
BELZ The Bais Din Tzdek of K'hal Machzikei Hadas
Rabbi Moshe Y.L.Landa(Ravof Bnei-Brak)
Rabbi Nuchem Efraim (Noam) & Teitelbaum (Volver Rav)
Rabbi Shlomo Stern (Debraciner Rav)
Rabbi M. Weissmandl (Rav of Nitra-Monsey)
H.K.K. Kosher Certification Service of Hong Kong>