The answer to this question depends on who you ask and how long they have lived in Scottsdale. Scottsdale is 31 miles long and 11.4 miles wide at its widest point which explains why boundaries can be confusing.
Scottsdale is a very young city that has continued to fill in towards the northern boundary. At one time, anything north of Camelback was North Scottsdale. As the city grew, anything north of Shea Blvd. was considered North Scottsdale. Currently, the popular opinion is that North Scottsdale is the area north of the 101 freeway.
I have overheard that “it’s more a state of mind than a line on a map”.