A portable playground swing seat (10) is configured to interface with a playground swing and that includes an open-topped, rigid, cup shaped bucket (20) having a width compatible to a playground swing seat (22). The bucket is substantially oval in shape, having a raised back (24) with a hand hole (34) therethrough for manual portability. A removable soft fabric liner (42) interfaces the inner surface of the bucket to provide a supple and comfortable environment for a toddler when sitting within the portable swing seat. A five-point harness (50), which is adjustably affixed onto the bucket, is sized in length and contour to fit over the toddler's shoulders, chest and legs. Two rigid foldable attachment arms (54) are rotatably affixed onto the bucket for attachment to each playground swing chain. A swing seat strap (72) is firmly affixed onto the bottom of the bucket, and is sized in length to circumvent the lower portion of a playground swing seat for securing the swing seat to the swing along with the swing chain attachment arms.