David Henry Jacobs (30 April 1888 – 6 June 1976) was a Welsh-born track and field sprinter.

At the 1912 Summer Olympics in Stockholm, Jacobs won a gold medal as the first leg in the British 4 × 100 m relay team, despite finishing second behind the United States in the semifinals.

The United States was later disqualified for a fault in passing the baton, the same mistake made in the finals by the world record holder and main favourite German team.

[1] Although many times a Welsh champion, Jacobs never succeeded in winning an AAA title.

His body was returned to London, where he was buried in a Jewish cemetery,[4] at East Ham.