At least 7 same-sex couples married in Genesee County in 2013.
There are no official statistics available. The New York State Department of Health explains the absence of official statistics on same-sex marriage with this note:
With the passage of the Marriage Equality Act, same sex marriage became legal in New York on July 24, 2011. The composition of couples married after that date is not available since sex is not required information on the license.