I'm gonna start off by naming the ones I know off the top of my head

NFL (Super Bowl):
Baltimore Colts x1 (Super Bowl V)
Baltimore Ravens x2 (Super Bowl XXXV, Super Bowl XLVII)

MLB (World Series):
Baltimore Orioles x3 (1966, 1970, 1983)

CFL (Grey Cup):
Baltimore Stallions x1 (1995)

AIFA/AIF (indoor football)
Baltimore Mariners x2 (2010, 2014)

NLL:
Baltimore Thunder x1 (1987)

MISL (indoor soccer):
Baltimore Blast (1980-92 version) x1 (1983-84)

MISL II/MISL III/MASL (indoor soccer):
Baltimore Blast (current version) x8 (2002/03, 2003/04, 2005/06, 2007/08, 2008/09 2012/13, 2015/16, 2016/17)

How has your city fared with sports championships?

6 Super Bowls (1975, 1976, 1978, 1979, 2005, 2008)
5 World Series (1909, 1925, 1960, 1971, 1979)
5 Stanley Cups (1991, 1992, 2009, 2016, 2017)

Shrewsbury FC won the Welsh cup several times before they remembered they're not actually Welsh and stopped competing in it.

I think that's it.

1 NBA Championship in 1976, and MLS cup in 2015.

I'm not gonna count Arlington as my city because I've lived in Pennsylvania far longer than I've lived in Texas. And I hate the Cowboys.

In Pennsylvania, I lived in Shickshinny, so ... uhh ... No championships.

I was born in Daytona Beach, Florida, which has a minor league baseball team (The Daytona Tortugas). They won 6 league championships (1995, 2000, 2004, 2008, 2011 and 2013) and also won the 2014 and 2015 division championships.

Between the Jets, Knicks & Mets... not many, let's put it that way.

The question was how many championships has your CITY won, not how many championships has your favorite teams won. All those teams are in different locations.

I never learned to read

That explains a lot

2 World Series Victories - Blue Jays (MLB)
13 Stanley Cups - Leafs (NHL)
16 Grey Cups - Argonauts (CFL)

Jack shit