Dame Barbara Logan Hay DCMG LVO MBE is a British diplomat who served as consul-general in Los Angeles for four years until 2013.

As the Russian Federation replaced the Soviet Union, the British consulate-general in St Petersburg was re-opened, and Barbara was appointed as its first new consul-general in 1991. In 1992, she returned to London, before being appointed as ambassador to Uzbekistan and concurrently (non-resident) ambassador to Tajikistan in 1995. She was the first female ambassador in Tashkent. In 2000, she returned to St Petersburg for a second stint as consul-general until 2004. Barbara then took up the post as consul-general in Los Angeles in 2009.