There is no city at that location. This is in the middle of the Tyrrhenian Sea.
Spain
Castellón de la Plana, Spain.
Spain
Jannali
Tarancón, Spain.
New York City is the closest city to the coordinates 40 degrees north latitude and 74 degrees west longitude.
Creighton, South Africa
40 N 5 W is the Iberian Peninsula, Toledo, Spain.
The latitude and longitude of Spain is 40°00N and 4°00W.
Castellón de la Plana, Spain.
The city near 40-45 degrees N latitude and 90-100 degrees W longitude is Chicago, Illinois, USA.