Midnight Sun (1940–65) was one of the leading sires of the Tennessee Walking Horse breed, and a two-time World Grand Champion in 1945 and 1946.

Midnight Sun was foaled on June 8, 1940, out of a mostly Standardbred mare named Ramsey's Rena, and sired by the stallion Wilson's Allen.

He was a solid black stallion who matured to just under 16 hands (64 inches, 163 cm) and weighed 1,350 pounds (610 kg), unusually stout for his breed.

[6][1] Midnight Sun was known for his calm disposition; it wasn't uncommon for stablehands at his home, Harlinsdale Farm near Franklin, Tennessee, to let visiting children ride him bareback, so they could say they rode a two-time world grand champion.

[12] Midnight Sun sired approximately 2,600 foals in his lifetime,[13] and during his stud career earned his owners close to $100,000 a year, mostly through the then-new use of artificial insemination (AI).

For many years, a life-size statue of Midnight Sun, commissioned after his death by his former owner Geraldine Livingston, stood at the TWHBEA headquarters in Lewisburg, Tennessee.