There are 5 seasons and 116 episodes of Modern Family (TV Series) from 2009 to present..
So that, Modern Family (TV Series) have 5 seasons:
1. Season 1 (2009–10)
2. Season 2 (2010–11)
3. Season 3 (2011–12)
4. Season 4 (2012–13)
5. Season 5 (2013–14)
See more details here : Wikipedia