Katie Milligan

Katie Milligan

Licensed Associate Real Estate Broker | Licensed as Catherine B. Milligan
katie.milligan@compass.com
M: 516-848-9814

Specialties

Certified Buyer Representative 
Listing Agent
Consulting

Education

Southampton College 
Foxcroft
About Katie

Katie was born outside Chicago, raised in Palos Verdes Estates, spent time in Middleburg, and ultimately made the East End home. She started in Southampton and now lives in Water Mill, where she enjoys the open farmland and big sky.

For over 35 years, Katie and her husband built and ran a successful seafood distribution business on the East End. Along the way, she gained firsthand real estate experience as both a buyer and seller, investing, renovating, and managing multiple properties—experience that now informs her work as a broker. 

A longtime Water Mill resident with deep community ties, Katie raised her family locally and is closely connected to the area. Today, she brings sharp business instincts, market knowledge, and a steady, thoughtful approach to every transaction. She has a strong eye for value, advocates for her clients, and takes pride in delivering a smooth, successful experience from start to finish.

Katie loves travel and time with family, but the East End is home. She’s passionate about helping others find their place here and experience everything it has to offer.



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Katie Milligan’s Listings

a front view of a house with a garden
a front view of a house with a garden
a bathroom with a sink mirror and vanity
1/3
Listed By Compass

$16,500,000

7
Bedrooms
Unavailable
Bathrooms
Unavailable
Square Feet
0.83
Acres

Undisclosed Address, Southampton, NY 11968

$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
$3,675,000 | 45 Wooley Street, Southampton, NY 11968
1/18
Listed By Compass

$3,675,000

3
Bedrooms
2,366
Square Feet
0.49
Acres

45 Wooley Street, Southampton, NY 11968

a view of backyard with outdoor seating and green space
a view of a field with an ocean
a front view of a house with a garden and yard
a front view of a house with a yard
a front view of a house with a yard and garage
a front view of a house with a garden
a view of a terrace with sitting area
a view of a house with backyard sitting area and garden
a view of a house with a yard and large trees
an aerial view of a house with a garden
a view of a tennis ground with large trees
an aerial view of a house with a garden and swimming pool
a front view of a house with garden
a view of a house with backyard sitting area and garden
a view of an entryway with staircase
a living room with furniture a flat screen tv and a table
a living room with furniture fireplace and a large window
a living room with furniture and a flat screen tv
a living room with fireplace furniture and a flat screen tv
a bedroom with furniture and large windows
a dining room with furniture window wooden floor
a kitchen with stainless steel appliances a stove a sink and white cabinets
a kitchen with stainless steel appliances kitchen island granite countertop a sink and a stove
a kitchen with granite countertop a stove and a sink
a large kitchen with stainless steel appliances granite countertop a lot of counter space and a sink
a bathroom with a toilet and a shower
a bathroom with a sink toilet and shower
a bedroom with a bed and window
a bedroom with a bed and wooden floor
a spacious bathroom with a double vanity sink a mirror and a bathtub
a bedroom with a bed and a window
a en suite bathroom with a double vanity sink a mirror and a shower
a bathroom with a glass shower door and a toilet
a bedroom with two beds and a flat screen tv
a living room with furniture and a large window
a utility room with sink dryer and washer
a bathroom with a sink a toilet and shower
a picture of room with window and wooden floor
a view of a large yard with lots of trees
a view of a city
a view of a building with a street
a view of a swimming pool with an outdoor seating
$3,295,000 | 2 Jodys Path, East Hampton, NY 11937
1/43
Listed By Compass

$3,295,000

4
Bedrooms
3,940
Square Feet
1.9
Acres

2 Jodys Path, East Hampton, NY 11937

$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
$2,150,000 | 1 Henry Street, Southampton, NY 11968
1/23
Listed By Compass

$2,150,000

3
Bedrooms
1,478
Square Feet
0.18
Acres

1 Henry Street, Southampton, NY 11968

Katie Milligan’s Transactions

Past Sales
an aerial view of a city

$7,749,000

1.42
Acres

12 Halsey Path, Southampton, NY 11968

.

$7,000,000

4
Bedrooms
3.5
Bathrooms

130 Toylsome Lane

Southampton

front view of a house with a garden

$7,000,000

7
Bedrooms
0.83
Acres

130 Toylsome Lane, Southampton, NY 11968

$5,825,000

4
Bedrooms
3.5
Bathrooms

31 Pheasant Close North

Southampton

a car parked in front of a brick house next to a yard

$5,400,000

5
Bedrooms
3,200
Square Feet
0.47
Acres

129 Halsey Lane, Bridgehampton, NY 11932

$5,000,000 | 224 Downs Path | Southampton

$5,000,000

4
Bedrooms
4
Bathrooms

224 Downs Path

Southampton

$4,550,000 | 74 Shinnecock Hills Road, Southampton, NY 11968

$4,550,000

7
Bedrooms
7,035
Square Feet
2.1
Acres

74 Shinnecock Hills Road, Southampton, NY 11968

Listing Courtesy of BERKSHIRE HATHAWAY

an aerial view of a house with outdoor space

$4,425,000

5
Bedrooms
3,900
Square Feet
1.68
Acres

17 Jordan Drive, Water Mill, NY 11976

$4,350,000

5
Bedrooms
12,153
Square Feet
2.02
Acres

14 Fairleigh Court, Sag Harbor, NY 11963

a view of a swimming pool with lounge chairs

$4,150,000

6
Bedrooms
0.6
Acres

138 Big Fresh Pond Road, Southampton, NY 11968

an aerial view of a house

$3,625,000

5
Bedrooms
6,809
Square Feet
0.93
Acres

148 Whites Lane, Southampton, NY 11968

$3,600,000

4
Bedrooms
3
Bathrooms
2,311
Square Feet
1.76
Acres

13 Westway Drive, Southampton, NY 11968

$3,325,000

8
Bedrooms
4
Bathrooms
4,443
Square Feet
1.47
Acres

179 Narrow Lane South, Water Mill, NY 11976

$3,290,000 | 14 Burkeshire Dr | Sag Harbor

$3,290,000

5
Bedrooms
5
Bathrooms

14 Burkeshire Dr

Sag Harbor

an aerial view of a house with swimming pool big yard and large trees

$3,200,000

4
Bedrooms
3,930
Square Feet
1.6
Acres

14 Randall Road, Southampton, NY 11968

a front view of a house with a garden

$3,175,000

4
Bedrooms
1,900
Square Feet
0.35
Acres

136 Elm Street, Southampton, NY 11968

a front view of a house with a yard

$3,170,000

5
Bedrooms
4,372
Square Feet
0.51
Acres

11 Woodpink Drive, East Hampton, NY 11937

Past Rentals
$11,667 | 127 Narrow Ln S | Water Mill

$11,667

127 Narrow Ln S

Water Mill

$5,417

35 Harris Ln

Southampton

$1,500 | 198 Towd Point Rd | Southampton

$1,500

4
Bedrooms
4
Bathrooms

198 Towd Point Rd

Southampton