Ivar Bengt Nilsson (12 June 1933 – 26 February 2019) was a Swedish speed skater. He was born in Göteborg, Sweden. He won a bronze all-round medal at the 1962 world championships. He competed at the 1960 and 1964 Winter Olympics in 1,500 m, 5,000 m and 10,000 m events with his best achievement having been a fourth place finish in the 10,000 m event in 1960.