Eileen O'Sullivan

Eileen O'Sullivan
Real Estate Agent (Associate Broker)
Port Washington NY

Associate Broker (NY: 10301218193)

REALTOR® 1 Active Listings Serves Nassau County, NY
View on Realtor.com

Contact Information

Brokerage
Port Washington

Office Website
Office Address
475 Port Washington Blvd
Port Washington, NY  11050
(Nassau County)
Office Phone
516-883-5200
Office Fax
Mobile
347-351-6359
Email
eileen.osullivan@elliman.com

Service Areas

Port Washington: NY Flower Hill: NY Baxter Estates: NY Plandome Manor: NY Port Washington North: NY Manorhaven: NY Sands Point: NY Thomaston: NY Manhasset: NY Plandome Heights: NY Plandome: NY North Hills: NY Munsey Park: NY Herricks: NY Williston Park: NY East Williston: NY Village of Garden City: NY Garden City: NY Uniondale: NY Garden City South: NY Stewart Manor: NY Sea Cliff: NY Glen Cove: NY Glen Head: NY East Hills: NY Roslyn: NY Roslyn Estates: NY Searingtown: NY Roslyn Harbor: NY New Hyde Park: NY Manhasset Hills: NY North New Hyde Park: NY Queens: NY New York: NY Garden City Park: NY Hillside Manor: NY

About Eileen O'Sullivan

Eileen is a dedicated real estate professional and certified buyer representative, recognized for her commitment to exceeding client expectations. With a full-time focus on real estate, she possesses a deep understanding of the market, which she leverages to provide clients with essential insights for informed decision-making. Her meticulous attention to detail and unwavering dedication ensure that transactions are not only successful but also seamless. Clients trust Eileen to effectively market their properties and to help them find homes that align with their lifestyles.

Before embarking on her real estate career, Eileen spent over 16 years with a Fortune 500 company, where she honed her sales and marketing acumen in the financial media and construction industries. Her leadership abilities and business expertise earned her several corporate accolades. Eileen is also a proud graduate of Fordham University, frequently returning to campus to support the athletic teams and reconnect with old friends.

As a resident of Port Washington, Eileen appreciates the numerous benefits of life on the North Shore. Her three children are enrolled in local schools and actively participate in the town's cultural and athletic programs. Eileen recognizes that purchasing a home encompasses much more than the property itself; she equips her clients with comprehensive information to fully embrace the advantages of their chosen neighborhoods.

Nassau County, NY Real Estate Market Analysis (Single Family Homes)

$1,496,994
Avg. Listing Price
From Eileen's portfolio
4.1 / 3.0
Avg. Beds/Baths
Typical property size
2,500 sf
Avg. Square Footage
Interior living space
3110
Active Listings
Current inventory

If you need to reach working real estate agents in Nassau County, New York, this list was built for you. Mortgage lenders prospecting for referral partners, title companies looking to grow their closing volume, PropTech platforms launching in the New York metro, insurance providers targeting E&O or home warranty clients, continuing education providers, and recruiters building out their agent pipelines all rely on this data to drive outreach that actually lands in front of licensed professionals.

When you buy Nassau County real estate agent email list data from a source that maintains it properly, you are not just getting a spreadsheet — you are getting a direct line to {{AGENT_COUNT}} actively licensed agents with verified email addresses, plus {{CELL_COUNT}} agents who also have cell phone numbers on file. That kind of reach, at the county level, gives any B2B campaign a serious head start over cold prospecting from scratch.

Why Buy a Nassau County Real Estate Agent Email List From Dr Bill

This data is sourced directly from the New York State real estate licensing board, which means every contact represents a currently licensed agent — not someone who let their license lapse two years ago. New emails are added weekly, the full list is cleaned monthly, and the entire database is refreshed bi-annually. That ongoing maintenance is what backs the 96% deliverability guarantee. Cheap list vendors do not offer that because they cannot — they are reselling stale compiled data with no maintenance cycle behind it.

Dr Bill has been in the list business since 2005 and has sold over 31,000 lists to marketers, lenders, recruiters, and vendors across every industry that serves real estate professionals. That track record matters when you are spending real budget on outreach. The Nassau County file is available at the state, county, city, and zip code level — and no other vendor offers zip code-level segmentation within Nassau County specifically.

How to Use This Nassau County Agent List

The most immediate use is cold email outreach through platforms built for it. Tools like Zap Contact (zapcontact.com) are designed to handle verified B2B contact lists, manage sending volume, and track campaign performance without getting flagged. Beyond email, the same data supports direct mail drops, phone and SMS campaigns using the included cell numbers, and LinkedIn audience matching to layer in display-level touchpoints alongside your direct outreach.

You can also segment the list by broker versus sales agent status, which changes your messaging entirely. Brokers respond to different value propositions than individual agents, and splitting your campaign accordingly consistently improves conversion rates across every channel.

Why Nassau County, New York Agent Data Matters

Nassau County covers a dense, high-activity market that includes Garden City, Great Neck, Hempstead, Mineola, Hicksville, and Valley Stream, among others. With {{AGENT_COUNT}} licensed agents working across these communities, the county represents a concentrated professional population worth targeting on its own terms — not as a footnote inside a statewide New York blast that dilutes your budget across irrelevant markets.

Local targeting at the Nassau County level lets you tailor your offer to the specific submarkets and brokerage culture agents here actually work in. A statewide list means competing for attention alongside every other vendor blasting Albany, Buffalo, and Syracuse simultaneously. A county-level file with zip code segmentation means your message reaches the right agents, in the right neighborhoods, with copy that speaks directly to their market.

Current Property Listings

As of 6/27/2026, Eileen O'Sullivan has 1 property for sale in Port Washington and surrounding areas.

$1,599,000

Listed 2025-08-12

1782 E 19th St
Brooklyn, NY  11229

Beds: 5.0
Baths: 3.0
Sq Ft: 0
Lot: 1,900 sf
Multi Family Map
View Full Details

Current Property Rentals

Eileen O'Sullivan currently has no rental properties available in Port Washington and surrounding areas. Check back later.