Bertil "Klumpen" Nilsson (born 16 January 1936) is a former Swedish footballer.

Nillson started his career at Malmö FF and made his Allsvenskan debut at seventeen years of age.

He was later convinced to move to Halmstad to play for IS Halmia which he did until 1964 when he returned to Malmö FF.

Nilsson won the league with Malmö in 1965 before he finished his career playing for Landskrona BoIS and later Lunds BK.

During his career he also played six times for Sweden, he earned the first cap at nineteen years of age.