Are Chicanos the same as Mexicans?

Here is a "taxonomy" that may be a useful reference for this topic:

"Spanish people"
This term is used frequently in the United States to refer indiscriminately to any person that speaks Spanish. As such, it is imprecise and often inappropriate in that it includes people from more than two dozen countries, spanning all of the American continent, the Caribbean and Spain. The term does apply specifically, however, as the proper name for the native people of Spain, and for this reason it is as incorrect to use it to refer to any and all Spanish-speakers as the term "English" would be to refer to citizens of New Zealand, Australia or the United States.