David Morgan Adams (23 February 1875 – 19 May 1942) was a British Labour Party politician.
He was the son of David Morgan Adams of Ystradowen, near Cowbridge, Glamorgan in South Wales and Bessie Dent of Poplar in the East End of London. He received elementary education in the local school in Ystradowen before entering employment in a coalmine as a teenager. He later joined the Merchant Navy as an able seaman, subsequently working on the light ships maintained by Trinity House.
By 1913 he was resident in Poplar, and was elected to the local board of guardians. With the outbreak of the First World War in 1914 he enlisted in the Welsh Regiment, and spent most of the war in India.
After the war he was employed in the docks by the Port of London Authority and was an official in the Transport and General Workers Union. In 1919 he was elected as a Labour Party member of Poplar Borough Council, later becoming an alderman and was mayor of Poplar in 1934 – 1935. He was a member of the Metropolitan Asylums Board from 1928 – 1930.
In April 1930 he was elected unopposed to fill a vacancy on the London County Council, representing Poplar South. He subsequently held the seat at elections in 1931 and 1934, retiring from the council in 1937.