Title: Slasher (TV series)
Content:  Production on Slashers 8-episode first season was announced on July 28, 2015, with filming taking place between then and October 2015. Three Northern Ontario municipalities — the cities of Sudbury and Sault Ste. Marie and the town of Parry Sound — would stand in for the show's fictitious location, the town of Waterbury. Unlike most television series that film their episodes in order, under the direction of Craig David Wallace, the series was shot as if it were a "super-sized" movie. Scenes from multiple episodes were filmed simultaneously, with the availability of locations and cast being factored in. The out-of-order schedule allowed the actors to acknowledge their characters' fates, especially those who had to film their death scenes one day but returned later to film earlier scenes if necessary. As an example, Martin cited Mark Ghanimé's first day on set, when his character, Justin Faysal, was laid out in a casket for a scene early in Slashers third episode. Justin's death, which took place in the second episode, would be filmed later on. On May 1, 2017, Slasher began filming a second season in Orangeville, Ontario, Canada.
Title: Slasher (TV series)
Content:  Each season is centered on a masked killer with an unknown motive for killing their victims. The first season, retroactively subtitled The Executioner, was co-produced by Chiller and Super Channel, and centered on a mysterious figure billed as the Executioner who terrorizes the fictional town of Waterbury, Canada. The second season, subtitled Guilty Party, follows a group of former summer camp counselors who return to an isolated campground in order to retrieve the body of a murder they committed, before being targeted, one by one, by an unknown killer. The third season, Solstice, is centered on a group of neighbors who are targeted during the summer solstice period due to their complicity in not saving a murder victim who was killed one year earlier in front of their apartment complex. The fourth season, Flesh & Blood focuses on the wealthy yet dysfunctional Galloway family but after the sudden death of the family's patriarch the remaining family members are forced to compete in a series of twisted games in order to win the family's entire fortune all the while being hunted by a masked killer.
Title: Slasher (TV series)
Content:  Slasher is an anthology horror television series created by Aaron Martin. It premiered on Chiller on March 4, 2016, and on Super Channel on April 1, 2016. The licensing rights for the second season were acquired by Netflix in January 2017. The second season was released on October 17, 2017. On August 8, 2018, the series was renewed for a third season, which premiered on May 23, 2019. An eight-episode fourth season was ordered for Shudder, following on August 12, 2021.
Title: Slasher (TV series)
Content:  A first trailer for the series premiered on November 26, 2015. On May 25, 2016, the entire first season of Slasher became available to stream instantly on Netflix US. On October 17, 2017, the full second season of Slasher became available to stream on Netflix in various countries. The series airs in the United Kingdom on Pick, where the first season premiered on May 10, 2016 and the second season on May 1, 2018. On May 23, 2019, the full third season of Slasher became available to stream in various countries on Netflix. In April 2020, Netflix removed all three seasons of Slasher with no explanation or prior warning. In late June 2020, all three seasons of Slasher were re-added to Netflix.
Title: Slasher (2004 film)
Content:  Slasher is a 2004 documentary film directed by John Landis for the Independent Film Channel. The film was produced by Chris Kobin, Stephen Cantor, and Daniel Laikand. Shot over a weekend in Memphis, Tennessee, the film centers on uber-used car salesman Michael Bennett, a traveling master of the Slasher Sale, Kevin-the-DJ, and Mudd the closer, as they put on a tent-style used car sale.
Title: List of Slasher episodes
Content:  Slasher is a Canadian horror anthology television series created by Aaron Martin which premiered on March 4, 2016 on Chiller. The series' licensing rights were purchased by Netflix in January 2017 and the following seasons were released exclusively via Netflix's web streaming service. The second season was released on October 17, 2017. In November 2020, the series was moved to Shudder for a fourth season.
Title: Slasher (TV series)
Content:  Slasher became Chiller's first and only foray into original scripted series content. In May 2017, Shaftesbury Films confirmed that the series wasn't returning to Super Channel or Chiller for a second season. However, streaming service Netflix acquired the rights to the second season. The second season was released via Netflix on October 17, 2017. In August 2018, it was announced that production commenced for the third season of Slasher. On October 23, 2018, Adam MacDonald was announced as the third season's director. On April 24, 2019, it was announced that Aaron Martin had stepped down as the showrunner and Ian Carpenter would serve as the primary showrunner and one of executive producers of the third season. On November 12, 2020, the series was moved to Shudder for a fourth season.
Title: Slasher (TV series)
Content:  Slasher was created by Aaron Martin, who was inspired after his work on the first season of the medical series Saving Hope, specifically his writing of two episodes in which "people got chopped up." He wrote the first episode of the series as a spec script, aiming to offer it to prospective studios and show a writing style that was different from his previous work (e.g. Saving Hope, Degrassi: The Next Generation, and Being Erica). Though the script did not receive immediate interest, Shaftesbury Films optioned it in late 2014 with an eight-episode order and started pitching around to networks. Canadian premium network Super Channel ordered the project after getting interested by Slashers fixed-end format. The now-defunct American network Chiller, which specializes in the horror thriller genre, joined production shortly 
Title: Killing Season (film)
Content:  The project was originally set in the 1970s and titled Shrapnel. It was being considered by John Travolta and Nicolas Cage as a project to follow up on their film Face/Off and by director John McTiernan as a directing vehicle. Subsequently renamed and modified to take place in modern-day Appalachia, and co-financed and co-produced by Corsan, Nu Image and Millennium Films, filming began on January 16, 2012,   in the Appalachian Mountains of north Georgia. Major filming was scheduled for Tallulah Gorge State Park and Black Rock Mountain State Park. The locations in Rabun County were chosen by director Mark Steven Johnson to create the effect and mood he had previously seen in the film Deliverance. Other minor filming locations included Sofia, Bulgaria, Sweetwater Creek State Park, and the Pine Mountain Gold Museum in Stockmar Park, Villa Rica. International sales for Killing Season, offered by the American Film Market, commenced on November 2, 2011, in Santa Monica. American cellist/singer/songwriter Ben Sollee contributed solo cello performances as well as an original song, "Letting Go", for the end credits.
Title: The Slayer (film)
Content:  In 1981, writer-director J.S. Cardone was working at a liquor store in Los Angeles while attempting to break into the film business, and pitched the idea for The Slayer to producer William R. Ewing. The International Picture Company, an independent film studio based in Atlanta, agreed to help produce the project on a budget of approximately $750,000. As a result of the studio's basis in Georgia, the crew scouted areas in the state to shoot the film, settling in Tybee Island, east of Savannah, Georgia. Upon arriving at the island—which at that time was largely uninhabited and dilapidated—Cardone recalled it fit perfectly with the vision he had had for the film while writing the script. Filming took place in the winter of 1982 on Tybee Island with additional photography in Savannah.

Question: where was the first season of slasher filmed?
Answer: Orangeville, Ontario, Canada.
Sudbury, Parry Sound.