KSFY-TV (channel 13) is a television station in Sioux Falls, South Dakota, United States, affiliated with ABC.

In 1969, the Federal Communications Commission (FCC) forced the breakup of this network, and KSOO-TV became the sole NBC affiliate.

[3] The television stations were bought by Forum Publishing Company of Fargo, North Dakota in 1974 and switched their call letters respectively to the current KSFY and KABY.

Additionally, KSFY had three full-power transmitters to KDLT's one, and Forum's flagship stations WDAY and WDAZ in the eastern part of North Dakota were also converting to ABC affiliations at the same time.

In 1996, AFLAC sold its broadcasting division to Retirement Systems of Alabama, who merged it with Ellis Communications to form Raycom Media.

[6] Gray needed to obtain a waiver in order to complete the deal, since the FCC normally does not allow one person to own two of the four highest-rated stations in a market.

However, in its filing requesting such a waiver, Gray argued that KDLT would be in a stronger position to compete in the market if its resources were combined with those of KSFY.

Gray contended that a KSFY/KDLT duopoly would fulfill "a dire need for an effective competitor" in the Sioux Falls market, where KELO-TV has been the far-and-away leader for as long as records have been kept.

This resulted in all of the network affiliations in eastern South Dakota being controlled by just two companies, Gray and KELO-TV owner Nexstar Media Group.