I've been searching around in books and on Google to see if I can get a good estimate for dry bean yield, either per plant or per pound seed. Does anyone here have that data from their own gardens?

Isn't that a very variable figure depending upon soils, temperature and other factors.

Absolutely, it's super variable! I guess I'm just trying to figure out if, in a household where we go through 4-6 cups of dry beans per week, dedicating 10-15 feet of row for dry beans would be worth the space. Would it even yield enough for a week of beans? In decent conditions?

Depends on the type of bean too. I have grown pole beans and used a second planting. Does that factor in?

Only in the past five years have I bothered to harvest dry beans; now I cannot give you the variety but I have harvested both red and white dry beans.
Out of less than six plants I got enough beans to fill what would be the mid-size bag of beans you buy at a store.
Now you have spend the time to let the pods dry, well, and then go about dealing with each pod one at a time unless you have some sort of miniature mechanical bean thrasher.

I was amazed at how many I got out of so few plants.
I had mine growing on a wire, one grade or so, above chicken wire circular frame six feet high and approx. 18 inches in diameter.
The beans had the most pods up towards the top.
Odd thing is I planted them to eat them in the green stage but never did either time.
Last thing is I did find different types of dry beans cook through at a different pace.

A video I found showed her planting a 20 foot row, harvesting dry pintos, cooking them then canning them and getting 6 pints of cooked canned pintos. She felt it was worth it. I would not.

RpR said:Only in the past five years have I bothered to harvest dry beans; now I cannot give you the variety but I have harvested both red and white dry beans.
Out of less than six plants I got enough beans to fill what would be the mid-size bag of beans you buy at a store.
Now you have spend the time to let the pods dry, well, and then go about dealing with each pod one at a time unless you have some sort of miniature mechanical bean thrasher.

I was amazed at how many I got out of so few plants.
I had mine growing on a wire, one grade or so, above chicken wire circular frame six feet high and approx. 18 inches in diameter.
The beans had the most pods up towards the top.
Odd thing is I planted them to eat them in the green stage but never did either time.
Last thing is I did find different types of dry beans cook through at a different pace.

This sounds encouraging! Maybe I'll let a few pole beans go and see what happens.