The first-time mom-to-be, 30, is due in December, with boyfriend Scott Disick's baby.
"It was a huge success," a source tells PEOPLE of the shower, which began at noon and was organized by Los Angeles-based event planner Sharon Sacks, at the family's home in Hidden Hills, Calif.
Other guests included Kim's BFF, Tres Glam jewelry designer Brittny Gastineau and Kris's good friend, comedian Heather McDonald, a regular on Chelsea Lately.
At the shower, guests nibbled on chocolate-covered strawberries from Studio City-based Berry Elegance, and while Kourtney loaded up on gifts, so did they! Each attendee received a Le Sport Sac weekender bag filled with We Pilates shirts and scarves; a bottle of Essie nail polish in a limited edition color called "Little Baby Dash" – a nod to the Kardashians' Dash stores – a hand-blown glass personal tea set from Primula; a gift card from Sheila Kelley S Factor, and an Alex & Ani expandable bracelet.
"She's a really cute pregnant girl. It's just a big belly," Kim said when she was planning the party. Check out just how cute Kourtney was when she was still hiding her belly!