1978 Davis Cup Eastern Zone
The Eastern Zone was one of the three regional zones of the 1978 Davis Cup.
11 teams entered the Eastern Zone, with 7 teams competing in the preliminary round to join the previous year's semifinalists in the main draw. India and Indonesia received byes into the quarterfinals, while Australia and New Zealand received byes into the semifinals. The winner of the main draw went on to compete in the Inter-Zonal Zone against the winners of the Americas Zone and Europe Zone.
Australia defeated New Zealand in the final and progressed to the Inter-Zonal Zone.
Preliminary rounds
First round
Philippines vs. ThailandJapan vs. Chinese Taipei
'''Pakistan vs. Malaysia'''
Qualifying round
Philippines vs. Japan'''South Korea vs. Pakistan'''
Main draw
Quarterfinals
Japan vs. Indonesia'''India vs. South Korea'''
Semifinals
Japan vs. Australia'''India vs. New Zealand'''