In the November 2016 election, Onondaga County, New York, tallied all write-in votes, even though no law required election officials to prepare this tally. Here is a newspaper story about the tally. Onondaga County contains Syracuse and is one of New York’s most populous counties.
County election officials observed that more write-in votes are being cast in New York, ever since the state eliminated mechanical “lever” voting machines and switched to paper ballots.