Judge Armstrong may refer to:
- David L. Armstrong (1941–2017), Jefferson County, Kentucky, county judge
- George Thomas Armstrong (1881–1941), county court judge for the southern judicial district of Manitoba
- James Armstrong (Pennsylvania politician) (1748–1828), associate judge of the Cumberland County, Pennsylvania, Court
- Joan Bernard Armstrong (1941–2018), judge of the Louisiana Fourth Circuit Courts of Appeal
- Robert P. Armstrong (born 1938), judge of the Court of Appeal for Ontario
- Saundra Brown Armstrong (born 1947), judge of the United States District Court for the Northern District of California