In its original American broadcast on October 13, 2011, "Garden Party" was viewed by an estimated 6.050 million viewers and received a 3.2 rating/8% share among adults between the ages of 18 and 49. This means that it was seen by 3.2% of all 18- to 49-year-olds, and 8% of all 18- to 49-year-olds watching television at the time of the broadcast. Although seeing a 3.8% increase in viewership, the episode matched the 18–49 demo rating from the previous episode, "Lotto". The episode ranked third in its timeslot beating Person of Interest which received a 2.7 rating/7% share in the 18–49 demographic and The Secret Circle which received a 0.8 rating/2% share, but was defeated by Grey's Anatomy which received a 3.4 rating/9% share and The X Factor which received a 3.6 rating/10% share.
