The Young Professional's Guide: With a median age of 36.3, Wilmington is a hotspot for those looking to build a career in Delaware. The city supports a population of 70926 and maintains a median income of $49,354.00. If you aren't ready to commit to a $173,800.00 home purchase, the rental market—averaging $1,073.00—offers plenty of opportunities to find a room and a compatible housemate.