杰克罗素㹴（Jack Russell Terrier），是㹴犬的一种，为小型犬，平均身高为23至38公分，体重至8公斤。

杰克罗素梗是由19世纪后半时英国英格兰南部的德文郡上的一位神父杰克·罗素配种改良而成的。由于热衷猎狐运动的罗素神父对于当时狩猎犬种身形过大、体力有限的缺点感到不满，因而采用刚毛猎狐梗与其他梗类配种，希望能繁殖出一种斗争心强、精力旺盛，以及能追逐狐狸甚至钻入地洞的全能猎犬。经过多年的培育改良，一种新的猎狐犬种——即今日所见的杰克罗素梗，终于在英国出现。由于杰克罗素的智能很高、领悟能力极强，所以有不少电影都喜欢找牠们来客串一角，与主角一起泡制欢乐。

The Jack Russell Terrier is a small terrier that has its origins in fox hunting. It is principally white-bodied and smooth, rough or broken-coated.

The Jack Russell is frequently confused with the Parson Russell terrier (see the American Kennel Club) and the Russell terrier, which is a shorter-legged, stockier variety. (Within the Fédération Cynologique Internationale, the "Russell terrier" is also known as "Jack Russell terrier".) The term "Jack Russell" is also commonly misapplied to other small white terriers. The Jack Russell is a broad type, with a size range of 10–15 inches (25–38 cm). The Parson Russell is limited only to a middle range with a standard size of 12–14 inches (30–36 cm), while the Russell terrier is smaller at 8–12 inches (20–30 cm). Each breed has different physical proportions according to the standards of their breed clubs.