She designed the Children's Castle in Helsinki and the Taulumäki Church in Jyväskylä. She worked with Olavi Sortta to design the military hospital in Vyborg. Her brother was architect Kaarlo Borg. She is also the sister of graphic artist Esther Borg and Parliament member Margit Borg-Sundman.
- Maarit Henttonen, Elsi Borg, 1893-1958, arkkitehti, Suomen Rakennustaiteen Museo, 1995. ISBN 978-951-9229-87-4
|Wikimedia Commons has media related to Elsi Borg.|
- "Elsi Borg". Museum of Finnish Architecture. Retrieved February 4, 2012.