Robert Beatson Ross (23 September 1867 – 16 January 1949) was a Liberal Member of Parliament in New Zealand.

He was educated at Dunedin High School and joined the Railway Department as a clerk and telegraphist in 1883.

He was subsequently appointed the postmaster and stationmaster for Dipton at 1888, and later held similar positions at Te Aroha and Lincoln Junction.

In 1903, Ross sold his farm interest and attained work with the Colonial Mutual Life Assurance Society, setting up practice in Woodville, Hawke's Bay.

He won the Pahiatua electorate in the 1905 general election, and held it until 1911, when he was defeated by James Escott.