Tony-
2.
One boy and girl

Wanda-
3
1 girl and one set of twin boys

Clint-
4
2 boys and girls.

Steve-
1 girl

Bruce-
1 boy that was adopted.

Peter
2
1 girl and boy

Thor-
Triplets.
Oldest is a girl and two boys.

Natasha-
1 girl that was adopted.

Loki-
1 girl

Bucky-
2
1 girl and boy