Population by Housing Units (numbers) by Senate District
| District Number | Total Housing Units
1990 | Occupied Housing Units 1990 | Owner Occupied
Housing Units 1990 | Renter Occupied Housing Units 1990 |
Vacant Housing Units 1990 |
| | 4938140 |
4495966 | 3176693 | 1319273 | 442174 |
| 1 | 121036 |
105393 | 55109 | 50284 | 15643 |
| 2 | 93353 |
86510 | 60053 | 26457 | 6843 |
| 3 | 97129 |
82214 | 49805 | 32409 | 14915 |
| 4 | 97780 |
89141 | 58809 | 30332 | 8639 |
| 5 | 94161 |
89402 | 63934 | 25468 | 4759 |
| 6 | 89109 |
84714 | 59700 | 25014 | 4395 |
| 7 | 105944 |
92660 | 51092 | 41568 | 13284 |
| 8 | 94709 |
85034 | 54163 | 30871 | 9675 |
| 9 | 90140 |
85212 | 61396 | 23816 | 4928 |
| 10 | 87726 |
83632 | 67263 | 16369 | 4094 |
| 11 | 96875 |
91631 | 65652 | 25979 | 5244 |
| 12 | 90367 |
87387 | 65680 | 21707 | 2980 |
| 13 | 90797 |
86869 | 59326 | 27543 | 3928 |
| 14 | 100896 |
93804 | 63155 | 30649 | 7092 |
| 15 | 102684 |
95264 | 60708 | 34556 | 7420 |
| 16 | 98430 |
93567 | 62478 | 31089 | 4863 |
| 17 | 93714 |
89452 | 65385 | 24067 | 4262 |
| 18 | 94330 |
87828 | 62155 | 25673 | 6502 |
| 19 | 89600 |
85490 | 62152 | 23338 | 4110 |
| 20 | 136588 |
88205 | 68702 | 19503 | 48383 |
| 21 | 95491 |
85664 | 65573 | 20091 | 9827 |
| 22 | 105202 |
92457 | 62778 | 29679 | 12745 |
| 23 | 104293 |
88519 | 64323 | 24196 | 15774 |
| 24 | 90454 |
86546 | 62049 | 24497 | 3908 |
| 25 | 123027 |
90296 | 68728 | 21568 | 32731 |
| 26 | 94148 |
90694 | 66065 | 24629 | 3454 |
| 27 | 96903 |
89386 | 65928 | 23458 | 7517 |
| 28 | 94756 |
90435 | 64988 | 25447 | 4321 |
| 29 | 112332 |
92738 | 72673 | 20065 | 19594 |
| 30 | 101557 |
89036 | 66679 | 22357 | 12521 |
| 31 | 95106 |
89502 | 66225 | 23277 | 5604 |
| 32 | 104175 |
91705 | 67155 | 24550 | 12470 |
| 33 | 92266 |
86815 | 64098 | 22717 | 5451 |
| 34 | 95409 |
85917 | 57411 | 28506 | 9492 |
| 35 | 99233 |
90347 | 68030 | 22317 | 8886 |
| 36 | 86649 |
84049 | 61127 | 22922 | 2600 |
| 37 | 96174 |
92881 | 69492 | 23389 | 3293 |
| 38 | 113217 |
101155 | 48411 | 52744 | 12062 |
| 39 | 96353 |
90821 | 69233 | 21588 | 5532 |
| 40 | 95860 |
91644 | 71353 | 20291 | 4216 |
| 41 | 97187 |
88691 | 67615 | 21076 | 8496 |
| 42 | 102443 |
95097 | 62613 | 32484 | 7346 |
| 43 | 106898 |
99483 | 64117 | 35366 | 7415 |
| 44 | 90199 |
86419 | 66931 | 19488 | 3780 |
| 45 | 102050 |
95079 | 67948 | 27131 | 6971 |
| 46 | 97747 |
90844 | 68626 | 22218 | 6903 |
| 47 | 98445 |
92431 | 66961 | 25470 | 6014 |
| 48 | 91914 |
88185 | 67305 | 20880 | 3729 |
| 49 | 93582 |
87739 | 59274 | 28465 | 5843 |
| 50 | 101213 |
88875 | 66515 | 22360 | 12338 |
Source: U.S. Census Bureau: Census of Population and Housing, Summary Tape Files 1 and 3
Prepared by: The Pennsylvania State Data Center, Penn State Harrisburg