[2] Its boundaries were formalised in March 2000 to cover a portion of land adjacently north of the Murray Bridge city centre and including the Mobilong Swamp and Murray Bridge Irrigation Area.

[2] Mobilong was the original name for the early settlement of Murray Bridge itself.

The present-day locality, however, was specifically named after Mobilong Swamp in 2000.

[2] According to South Australian historian Geoffrey Manning, the word Mobilong is a corruption of the Aboriginal term mupulawangk, meaning "soft reed place" as "reeds along the [Murray] river bank were used in the making of coiled baskets.

"[3] The word appears to have first been used officially in the vicinity to name the cadastral division, the Hundred of Mobilong, in 1860.