James or Jim Jensen may refer to:

• James A. Jensen (1918–1998), paleontologist, known as Dinosaur Jim
• James H. Jensen (1864–1943), Wisconsin state assemblyman
• James Jensen (The Sadhu), character in The Sadhu
• Jim Jensen (reporter) (1926–1999), American TV journalist
• Jim Jensen (wide receiver) (born 1958), known as "Crash" Jensen
• Jim Jensen (Nebraska politician) (born 1934), Nebraska state senator
• Jim Jensen (running back) (born 1953), running back who mostly played for the Denver Broncos