Peter Gross may refer to:

• Peter Alfred Gross (1849–1914), American landscape painter
• Peter Gross (judge), British Court of Appeal judge
• Peter Gross (comics), comic book writer and artist
• Pete Gross (1936–1992), sports announcer in Seattle, Washington

• Hemizonia douglasii
• Hemizonia fasciculata
• Hemizonia filipes
• Hemizonia fitchii
• Hemizonia fremontii
• Hemizonia greeneana
• Hemizonia halliana
• Hemizonia heermanni
• Hemizonia hispida
• Hemizonia increscens
• Hemizonia kelloggii
• Hemizonia kellogii
• Hemizonia lobbii
• Hemizonia macradenia
• Hemizonia macrocephala
• Hemizonia martirensis
• Hemizonia minima
• Hemizonia minthornii
• Hemizonia mohavensis
• Hemizonia mollis
• Hemizonia obconica
• Hemizonia oppositifolia
• Hemizonia pallida
• Hemizonia palmeri
• Hemizonia parryi