The 1970 New South Wales Open, also known by its sponsored name Dunlop Open, was a combined men's and women's tennis tournament played on outdoor grass courts at the White City Stadium in Sydney, Australia.

It was the 78th edition of the event and the second held in the Open era of tennis.

[3] The singles titles were won by Billie Jean King and Rod Laver who were both seeded first.

It was Laver's second singles title after 1961 and he won AUS$5,000 first-prize money.

[4][5][6] Rod Laver defeated Ken Rosewall 3–6, 6–2, 3–6, 6–2, 6–3 Billie Jean King defeated Margaret Court 6–2, 4–6, 6–3 Ken Rosewall / Fred Stolle defeated Bill Bowrey / Roger Taylor 6–3, 7–5