A few weeks ago, we used the pouring rain as an excuse to get in the car and drive 15 minutes from Center City to the Port Richmond section, which is home to a large Polish community. The Dinner House is a small restaurant, with only a few tables, but the menu is huge (love the magnet-board menu!). We feasted on sour rye soup with bits of kielbasa, potato pancake with goulash (HUGE! – not very photogenic, but delicious) and potato & cheese pierogi with fried onions. 
Everything was inexpensive, delicious and we definitely want to return to try some of the other items on the menu. They had some interesting home-made desserts, but we decided to walk down the block to a local bakery for a photogenic pastry.
Tobey says: I thought the sour rye soup would be weird, but it was actually really good!
Update 6/26: They’ve had a little decor refresh, but same rowhome and menu of traditional Polish meals. The magnet menu is still up, but now they’re laminated ones, too. Check out the fridge of Polish sodas. This time I got a great photo of the potato pancake with goulash. 
Everything was delicious. Also, I updated most of the post’s photos.
Location: Port Richmond (just north of Center City)
https://www.facebook.com/polishdinnerhouse/
Other places around the city to get pierogie include The Pierogie Kitchen (Philly Restuarant Review: The Pierogie Kitchen (Pierogie Heaven)) and Mom Mom’s (which you can also find around the city’s groceries (Riverwards, Hermans) in the frozen food section.
Secrets of Philadelphia 