WJAC-TV (channel 6) is a television station licensed to Johnstown, Pennsylvania, United States, serving the Johnstown–Altoona–State College market as an affiliate of NBC and The CW Plus.

WWCP-TV and WATM-TV maintain separate facilities on Lulay Street in the borough of Geistown (also with a Johnstown postal address).

WJAC and new sister station WTOV-TV in the Steubenville, Ohio–Wheeling, West Virginia market were sold to Cox Enterprises in 2000.

When KYW-TV switched to CBS on September 10, 1995, WJAC officially became the longest-tenured NBC affiliate in the Commonwealth of Pennsylvania.

Scholastic Quiz, a game show featuring local high school students, and Seniors Today (a public affairs program targeted to those 65 and older) would become mainstays of the station's programming and make host Ron Lorence (who would later build WADJ, later WBHV, at 1330 AM and then buy WYSN-FM 101.7, now WOWQ in Somerset County) a local household name.

[10] This made WJAC-TV a sister station to nearby WPGH-TV and WPMY in Pittsburgh though it is still connected to WPXI-TV through a news-share agreement.

On July 22, 2013, Horseshoe Curve Communications agreed to sell Fox affiliate WWCP-TV (channel 8) to Cunningham Broadcasting for $12 million.

It would have essentially made WJAC-TV, WWCP, and WATM all sister stations and expanded on their existing news share arrangement (see below).

The regular changes in WJAC's subchannel over its first few years reflect the decisions made internally about how to best make use of the new programming options afforded by Digital OTA broadcast.

[16] WJAC-TV's fourth digital subchannel serves as the market's CW affiliate, branded on-air as Alleghenies CW6.

Through aggressive statistical multiplexing, CW+ programming on WJAC-DT4 is broadcast in 720p high definition (albeit in a highly-compressed variation of that video resolution).

This station then began to produce WWCP's nightly prime time show and reduced the program to 35 minutes on weeknights while remaining a half-hour on weekends.

The newscast, still known as Fox 8 News at 10, now originates from a secondary set at WJAC's facility on Old Hickory Lane in Upper Yoder Township.

It features a separate news anchor on weeknights, who does not appear on WJAC, in addition to a different music and graphics package from broadcasts seen on the NBC outlet.

In addition to the new branding, WJAC updated their on-air graphics and theme music to those of its former sister station, WPXI, in Pittsburgh.

The nearby mountain ridges had prevented most of Altoona and all of State College from receiving the analog signal; conversely, many of Pittsburgh's outer-ring eastern and Westmoreland County suburbs actually got a grade B signal from WJAC, which in some cases, was superior to that of Pittsburgh NBC affiliate WPXI.