Viacom, Tribune, Weigel, Belo, Scripps-Howard, Cox, Clear Channel, Raycom, Sinclair and Meredith
Based on these TV station owners, I will try to reconstruct the local stations that syndicated "South Park".
New York: WPIX WB 11
Los Angeles: KCAL Ind 9 (11 PM)
Chicago: WCIU Ind 26
Philadelphia: WPSG UPN 57
Dallas: KTXA UPN 21
San Francisco: KBHK UPN 44
Boston: WSBK UPN 38
Washington, DC: WB
Atlanta: WUPA UPN 69
Houston: KIAH WB 39
Detroit: WKBD UPN 50
Phoenix: (station owned by Belo)
Seattle: KSTW UPN 11
Tampa Bay: WTOG UPN 44
Minneapolis: KMWB WB 23
Miami: WBFS UPN 33
Denver: KWGN WB 2
Orlando: WRDQ Ind 27
Cleveland: WUAB UPN 43
Sacramento: KMAX UPN 31
St. Louis: KPLR WB 11
Portland, OR: KWBP WB 32
Pittsburgh: WNPA UPN 19
Raleigh, NC: (station owned by Sinclair)
Charlotte, NC: WAXN Ind 64
Indianapolis: WNDY UPN 23
Baltimore: (station owned by Sinclair)
San Diego: KSWB WB 69
Nashville: (station owned by Sinclair)
Hartford, CT: (station owned by Tribune)
Kansas City: KMCI Ind 38
Columbus, OH: WWHO UPN 53
Salt Lake City: KUSG UPN 12
Milwaukee: WMLW Ind 41
Cincinnati: (either WSTR WB 64 or WXIX Fox 19)
San Antonio: (either KBEJ UPN 2, or one of the Sinclair stations)
Greenville, SC: (either WHNS Fox 21 or WBSC WB 40)
West Palm Beach, FL: WTVX UPN 34
Grand Rapids, MI: WXMI Fox 17
Oklahoma City: KAUT UPN 43
Las Vegas: KTUD UPN 25
Harrisburg, PA: WPMT Fox 43
Birmingham, AL: (station owned by Sinclair)
Norfolk, VA: WGNT UPN 27
Greensboro, NC: WUPN UPN 48
Albuquerque, NM: KASA Fox 2
Jacksonville, FL: WAWS Fox 30
Memphis, TN: WLMT UPN 30
New Orleans: WUPL UPN 54
Providence, RI: WLWC UPN 28
Albany, NY: WEWB WB 45
Tulsa, OK: KOKI Fox 23
Knoxville, TN: WTNZ Fox 43
Ft. Myers, FL: WNFM UPN 8
Lexington, KY: WDKY Fox 56
Dayton, OH: WRGT Fox 45
Charleston, WV: WVAH Fox 11
Wichita, KS: KSAS Fox 24
Flint, MI: WSMH Fox 66
Honolulu: KFVE WB 5