There are dinghy and keelboat championships:

US Junior Women's Singlehanded (Leiter in Radials)
US Junior Women's Doublehanded (Ida Lewis in 420a)
US Disabled Championships
Rolex International Womens Keelboat Championship (J22s)
US Junior Championships (ladder event: Laser, 420, triple-handed)
US Womens Match Race
US Offfshore Championship (Navy 44)
US Team Racing Championship (Hinman, V15)
US Youth Championship (Resume Invitational: Laser, Radial, 420, 29er)
US Youth Multihull
Championship of Champions
US Singlehanded (Ladder event: Laser)
US Match Racing (ladder event)
US Multihull (Alter)
US Mens and Womens Championships (Ladder event: small keelboat)

http://championships.ussailing.org/