Update:
I've updated the map with data from Philadelphia and PA county suburbs. Full disclosure:
1) Selected all zips within a 30 mile radius of PA, on the Philly side, and performed a table join.
2) Reclassified the color scheme, due to more records being entered into the database. Because the majority of records were way below the median household incomes in NJ, it pulled down the breaks. That's why you now see towns like Medford and Moorestown in green instead of in yellow.
The top median HH zips within a 30 mile radius of Center City Philadelphia are:
ZIP PO_NAME STATE MEDIAN_HH
19035 Gladwyne PA 222158
19085 Villanova PA 174481
18977 Washington CrossingPA 131413
19066 Merion Station PA 127445
18933 Lumberville PA 120832
18913 Carversville PA 118749
19312 Berwyn PA 117923
18934 Mechanicsville PA 116666
18954 Richboro PA 115612
19025 Dresher PA 115296
19436 Gwynedd PA 115131
19096 Wynnewood PA 112756
19319 Cheyney PA 112499
19373 Thornton PA 111847
19317 Chadds Ford PA 110265
19477 Spring House PA 109312
08003 Cherry Hill NJ 108877
19422 Blue Bell PA 108067
08560 Titusville NJ 106915
19041 Haverford PA 105489
08032 Grenloch NJ 104544
19087 Wayne PA 102468
18940 Newtown PA 102228
19342 Glen Mills PA 102059
18929 Jamison PA 101336
19333 Devon PA 101204
19444 Lafayette Hill PA 100786
08055 Medford NJ 100592
08057 Moorestown NJ 97966