Jacob Charles Lewis, 20, was reportedly struck by a suspected drunken driver after his car broke down in the early hours of Saturday morning.
He is understood to have attended Swift’s Eras Tour concert earlier that evening with his sister.
Now, Swift’s fans have taken to the GoFundMe page, with many donating $13 or $113 – a nod to Swift’s lucky number 13 – and quoting the 33-year-old musician’s lyrics.
More than $115,000 has been raised in Mr Lewis’s memory so far.
His sister April Bancroft posted on Twitter thanking fans for their donations.
“I cannot express the overwhelming gratitude from every Swiftie out there. Thank you thank you thank you. I will get to your messages eventually if I haven’t already, your words have inspired me through my day so much.”
Mr Lewis was reportedly taking a gap year from Sam Houston State University where he was majoring in musical theater. He also competed in the Pokemon world championships.
Swift has so far performed 13 out of 52 shows scheduled on the US leg of the Eras Tour, which was announced after the release of her tenth album Midnights.
Houston police department has charged a 34-year-old man in relation to the incident.
