What wheels fit what?

For Jeeps:

CJ's to '86: 5x5.5
Wrangler YJ (87 - 95) and TJ (97 - 06): 5x4.5
ALL Xj Cherokees (84 - 02) are 5x4.5
Grand Cherokee up to about 2004 is also 5x4.5
Jeep Wrangler JK (07 - 11): 5x5

Also, the 5 lug Toyota truck pattern on small pickups is 5x4.5

Also, 5-lug Mustangs (from 93 to about 2004) and crown vics/lincoln town cars are 5x4.5

Coming from the Jeep world, the 5x4.5 pattern was very much something I cared about until I switched to Ford axles and left unit bearings behind...

For 5x5.5 - All Ford 1/2 ton trucks from the mid 60's to 1996
All Jeep 5-lug from the mid 40's to 1986
Dodge trucks through the mid 80's
Newer Dodge 1500 trucks (weird backspacing on the newer trucks, though)

5x4 is new to me. Thankfully, my new Dart is 5x4.5