According to Official Guinness Records,
The fastest standing mile (electric car) is 304.94 kilometres per hour (189.481 miles per hour) and was achieved by Johnny Bohmer and Genovation Cars Inc. (both USA) at the Kennedy Space Center in Merritt Island, Florida, USA, on 28 July 2016. The car used in this attempt was a Genovation GXE that was converted to 100% electric in February 2015.
For a complete list of 2016 records, please visit 2016 Guinness Records in United States.