There is a department of justice. The department head is the attorney general.
Mont. Code Ann. § 2-15-2001
Department of justice -- head
En. 82A-1201 by Sec. 1, Ch. 272, L. 1971; amd
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.