ER1
# ER1

ER1 may refer to:

* ER1 (hospital), prototype hospital envisioned for the Washington D.C. area
* ER1 electric trainset, manufactured by Rīgas Vagonbūves Rūpnīca from 1957 till 1962
* Stadler KISS, electric trainset manufactured from 2008, in Sweden called ER1
