Does Lyft accept cash in my area?

No, Lyft does not accept cash anywhere (as of April 2018)

Lyft does not accept cash for payments at the time of this writing.  You pay through a credit card or debit card that is on file within your Lyft app.

Uber works similarly, but they have markets where cash is accepted.  for more informaiton, please refer to this topic below:

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Uber Driver, CEO of TaxiFareFinder and Unleashed, LLC