Teacher Ashling, from Tullamore, Co. Offaly was murdered on Wednesday.
The 23-year-old had gone for an afternoon run when her killer struck.
The vigil in Derry was staged by Alliance for Choice at 4pm on Friday and a large crowd attended.
9. DER - ASHLING MURPHY VIGIL
Sophia McFeely, Alliance for Choice Derry, speaking at the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 089
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One of the placards at the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 090
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Paul McKay with his children Sadhbh, Síofra and Fionn at the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 092
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Women light candles at the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 093