Robert "Bob" S. Nicholson (birth unknown – death unknown) was an English professional rugby league footballer who played in the 1930s, 1940s and 1950s. He played at representative level for Great Britain, England and Cumberland, and at club level for Hensingham ARLFC (in Hensingham, Whitehaven),^[4] Huddersfield and wartime guest at Hull FC, as a prop, or second-row.^[1]

Nicholson won caps for England while at Huddersfield in 1945 against Wales, in 1946 against France, in 1947 against Wales, in 1948 against France, in 1949 against Wales, and France,^[2] and won caps for Great Britain while at Huddersfield in 1946 against New Zealand, and in 1948 against Australia (2 matches).^[3] He also represented Cumberland. Bob Nicholson played at second-row, i.e.number 11, in Cumberland's 5-4 victory over Australia in the 1948–49 Kangaroo tour of Great Britain and France match at the Recreation Ground, Whitehaven on Wednesday 13 October 1948, in front of a crowd of 8,818.^[5] Nicholson played at second-row in Huddersfield's 4-11 defeat by Bradford Northern in the 1949 Yorkshire Cup Final during the 1949–50 season at Headingley, Leeds on Saturday 29 October 1949. Nicholson played second-row in Huddersfield's 2-20 defeat by Wigan in the Championship Final during the 1949–50 season at Maine Road, Manchester on Saturday 13 May 1950.^[6] His Testimonial match at Huddersfield took place in 1950.^[7]