The 15 towns and cities on Long Island employ more than 20,000 full-time, part-time and seasonal workers. Here are their records for employees paid in 2012.

Some towns could not provide a base pay for hourly workers. In many of those cases, an hourly pay rate is listed instead. The difference between base pay and total pay can be accounted for by many factors besides overtime, including shift differential, or payouts for unused vacation or sick time. Retiring workers may have received substantial payouts. Not all municipalities reported retirement or termination dates for all employees.

In some cases, a worker’s total pay may be less than the base pay because the worker did not work the whole year, taking an unpaid leave, for example. Some municipalities had names repeated. Unless the worker had the same title in the same department, those repetitions are listed here.

Payroll information was gathered under the state’s Freedom of Information Law by reporters Aisha al-Muslim Sophia Chang, Scott Eidler, Mitchell Freedman, Lauren R. Harrison, Mackenzie Rigg, Emily Ngo, Candice Ruud, David Schwartz, Nicholas Spangler and Patrick Whittle, with additional assistance from Kathy Diamond.