Today West Islip has its own fire department, post office, public library and Good Samaritan Hospital.

Bay Shore lies to the east, and in the north West Islip borders on Deer Park and Brentwood.

The racial makeup of the CDP was 85.9% Non-Hispanic White, 2.3% Asian, 0.7% Black, and 10.4% identifying as multiracial or “other race” on the US Census.

[7] Of the Non-Hispanic White population, West Islip residents claimed ancestries of Italian (43.7%), Irish (14.9%), German (5.9%), and Turkish (1.9%), among others.

West Islip is located approximately 1 mi (1.6 km) east of Babylon station on the Long Island Rail Road.

Suffolk County Transit bus route 2 runs along Montauk Highway in West Islip, also serving Good Samaritan University Hospital.