This interactive google map shows how many maple taps were driven in for each county. New York State and Vermont are the nation's biggest maple producers, but there are several other states that have smaller numbers of trees tapped. This is a consolidation of county level data, those counties with only one farm reporting maple production, were not included in the survey results, which depresses tap counts in counties that are marginal maple producers.
Data Source: USDA Agriculture Census, 2012. Maple Taps. Counts. https://quickstats.nass.usda.gov/