Can anyone tell me where I might find an index to help me find a topic in Mishna Berura (preferably in English)?
1An index of what? Word usage? Topics? You've only used one sentence. Surely there is more you can say to describe what you seek.– Double AA ♦Jul 1, 2016 at 0:06
@DoubleAA I was using the term index as it is usually used: "an alphabetical list of persons, places, subjects, etc, mentioned in the text of a printed work, usually at the back, and indicating where in the work they are referred to" (collinsdictionary.com/dictionary/english/index).– Yehuda WJul 1, 2016 at 1:30
There is an index called Yad Yisrael
Dirshu has an excellent Hebrew index on all 6 volumes of Mishna Brura, in one volume covering 6,000 categories and 30,000 sub-categories over 600 pages. You can see sample pages here. Although it is in Hebrew there are a few dozen pages in English at the end with words translated from modern Hebrew.
See a background article on the publication of this volume here.