An election was held on 21 November 1970 to elect 32 of the 60 seats in the Australian Senate.

This is the most recent occasion on which a Senate election has been held with no accompanying election to the House of Representatives; the two election cycles had been out of synchronisation since 1963.

The governing Coalition and the opposition Australian Labor Party won 13 and 14 seats respectively, resulting in a total of 26 seats each, while the Democratic Labor Party and three independents (two newly elected) held the remaining seats.