The short answer to this question is no. A dairy product is a food which comes from a milk-bearing animal, such as butter, milk, cream, or cheese. Eggs, on the other hand, do not come from cows, so they are not, in fact, considered a dairy product. More properly, eggs could be termed an animal byproduct, meaning that they are the product of an animal, and the animal did not have to be slaughtered to collect them. Eggs and dairy products have entirely different physical and chemical compositions which further distinguish them.

Eggs and dairy are often linked together in the eyes of the public, for a variety of reasons. Both are animal products, typically coming from farms, and in communities where dairy delivery is available, eggs can typically be ordered as well. Eggs and dairy products are also typically shelved near each other in the supermarket, because both require refrigeration, and it makes sense to build refrigerating units together, from an efficiency standpoint.

A dairy product can come from mammals like cows, goats, sheep, horses, yaks, llamas, camels, or other animals which produce milk. The precise chemical composition of a dairy product varies, depending on the animal it comes from, which explains why some people who have trouble digesting cow's milk can drink less rich milks, like sheep or goat milks. Animals which produce milk cannot produce eggs (with the exception of monotremes like the platypus).

Eggs, on the other hand, come from avians like chickens, ducks, and geese, among others. Again, with the exception of the monotremes, an animal which lays eggs cannot produce milk, so classifying eggs and dairy products together would be rather inappropriate. Eggs also have a markedly different composition from dairy; someone can eat eggs if he or she is allergic to dairy, and someone who is allergic to eggs can consume dairy products.

The link between eggs and dairy may also be related to the fact that the two are often used together in recipes, and to the fact that strict vegetarians avoid both, out of concern for animal welfare. Rarely, some people use the term “dairy” to refer to all animal byproducts, rather than specifically to milk product, in which case eggs would technically be considered a dairy product, but this definition for dairy products is extremely unusual.