Julie Jo Vollertsen Melli (born March 1, 1959, in Syracuse, Nebraska) is an American former female professional volleyball player.

The Nebraskan led the Palmyra High School volleyball team to their first appearance in the state tournament, earning Sunday Journal and Star All-State honors.

[6] She served the winning point in the 1983 NORCECA Women's Volleyball Championship title game against Cuba in which the US finished undefeated.

[10] In the third group game against world champions China, in which the already qualified teams were playing to avoid a semifinal matchup with Japan, she had a crucial impact off the bench, scoring points off serves and spikes as the US earned a 3–1 upset.

[11] The semifinal against Peru was a rematch of the 1982 world championship, this time Team US were victors, with Vollertsen scoring two decisive serves to win the first game.

[14] She played four years with the side, being eliminated from title contention on three occasions by perennial champions Teodora Pallavolo Ravenna (in Italian).

As a family, they received the Premio Reverberi (Oscar del Basket) (in Italian) Champion award in 2014 for their contribution to sports.