Below is a list of the current championship droughts of note.
Cities with three or more teams from MLB, NFL, NBA and NHL
The Twin Cities, MN- 1991 (Twins won World Series)
Phoenix-2001 (Diamondbacks won World Series)
Detroit- 2008 (Red Wings won the Stanley Cup)
New York- 2012 (Giants won the Super Bowl)
Cleveland- 2016 (Cavaliers won the NBA Championship)
Cities with two teams from MLB, NFL, NBA and NHL
Buffalo- 1971
^Buffalo has had at least two franchises continuously since the 1970-71 season. The city's last championship was the Bills' AFL championship in 1965.
Buffalo also had an NBA franchise from 1970-78.
Cincinnati-1990 (Reds won World Series)
Nashville- 1999
+Nashville has never won a title. The city has had two franchises, Titans and Predators, since the 1998-99 NHL season.
Charlotte-2005
&Charlotte has never won a title. The city has had two franchises, Panthers and Hornets since the 2004-05 NBA season. The city also had an NFL AND an NBA franchise from the start of the 1995 NFL season until the end of the 2001-02 NBA season.
Indianapolis-2007 (Colts won the Super Bowl)
