When looking at Long Island as part of the NYC metro area, usually Suffolk gets split in half. At least from my perspective as someone who grew up on LI. Though

When looking at Long Island as part of the NYC metro area, usually Suffolk gets split in half. At least from my perspective as someone who grew up on LI. Though that probably doesn't happen when looking at census data. (If you're familiar with Long Island, the metro area in Suffolk would be Suffolk - anything south of the Sunrise Highway up until Westhampton (going up north through Riverhead), and anything east of that boundary)