They're two of the largest police forces in the United States - and their officers are some of the highest-paid, as well.
As the Suffolk County Police Department celebrates its 50th anniversary this year and the Nassau County Police Department marks its 85th, Long Islanders may be comforted to know that the two departments also make our two counties one of the safest places to live in America.
Police officials in both counties say state-of-the-art technology, innovation and professionalizing policing have resulted in reduced crime rates, better response times to emergency calls and a safer 21st-century Long Island.
Here's how it all started:
The Nassau County Police Department turns 85
It was a time when criminals had a new weapon in their arsenal - the automobile - so they could slip over one town line into another and disappear into the muddling maze of jurisdictions that was 1920s Nassau.
To address that problem, the county's governing body, the Board of Supervisors, formed a committee, and on April 16, 1925, formally established the Nassau County Police Department.
Eighty-five years later, the department has grown from an all-Caucasian male force of 55 reassigned town and village sheriffs into an ethnically, racially and gender diverse force of 2,568 sworn officers and a civilian force of 1,214.
The Suffolk County Police Department turns 50
"Anybody on that shift probably had the same feeling," Schelling said of the anticipation he felt as a freshly minted Suffolk patrolman.
On that New Year's Day a brand new police department was born.