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The following outline is presented as an overview of and topical guide to German expressions in English:

A German expression in English is a German loanword, term, phrase, or quotation incorporated into the English language. A loanword is a word borrowed from a donor language and incorporated into a recipient language without translation. It is distinguished from a calque, or loan translation, where a meaning or idiom from another language is translated into existing words or roots of the host language. Some of the expressions are relatively common (e.g. hamburger), but most are comparatively rare. In many cases the loanword has assumed a meaning substantially different from its German forebear.