Nils Martin Ödahl was a Third Class passenger of the Titanic. He died in the sinking.

He was the son of Ola Nilsson Ödahl (b. 1865) and Hannah Nilsson (b. 1863). Coming from a family of six children, his siblings were: Jean Emil (1891-1986), Arvid Sigfrid (1894-1948), Otto Hugo (1897-1962), Emelie Germania (1900-1981) and Olga Amanda (1905-1996)

Nils had attended agricultural schools in Sweden and Denmark and worked as an agricultural inspector in Rydsgård, Örsjö. He was travelling to the USA to study further before returning to work in Sweden. His uncle, Nels O. Nilsson (1872-1929) had emigrated to the USA in 1895 and lived at 725 Warner Avenue, Peoria, Illinois with his wife and children. It was he who had sent Nils his ticket (7267 which cost £9, 4s, 6d).

Ödahl boarded the Titanic at Southampton as a Third Class passenger. He died in the sinking, and his body, if recovered, was never identified.

The Mansion House Fund paid 875.52 Kr (£48) to his parents and 912 Kr (£50) to his siblings. A claim for damages of 954 Kr (£50) was paid on 5 January 1915.

His parents remained in Sweden. His father died in 1931, and his mother in 1939.