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.

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Rebecca Allen holds a placard at the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 086

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A section of the attendance at the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 096

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A young girl attending the vigil for Ashling Murphy places a message on the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 082

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Martina Anderson and Karen Mullan were among the many women attending the vigil for Ashling Murphy who placed candles and flowers on the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 083

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Mel Bradley reads a poem during the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 084

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Colum Eastwood MP among the attendance at the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 085

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Mayor Alderman Graham Warke attended the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 087

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Candle and message at the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 081

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People who attended the vigil for Ashling Murphy held at the Guildhall Steps on Friday afternoon. Photo: George Sweeney. DER2202GS – 088

21. Ashling Murphy death
Undated handout photo issued by Comhaltas Ceoltoiri Eireann of Ashling Murphy, a primary school teacher in Tullamore aged in her 20s, who was killed on Wednesday afternoon along the banks of the Grand Canal at Cappincur, Co Offaly. Issue date: Thursday January 13, 2022. Photo: PA Wire