| Agency | Term # | 2004 Total | 2005 Total | % Change | Library | |
| Undef. | 0 | 2240 | 2192 | -2.14% | Undefined | |
| ADS | 10 | 165535 | 157383 | -4.92% | ADS Acorn | |
| ADS | 106 | 0 | 2620 | - | ADS Acorn self-checkout | |
| AMS | 11 | 185191 | 176598 | -4.64% | AMS Alsip | |
| BCS | 12 | 28407 | 28994 | 2.07% | BCS Beecher | |
| BIS | 13 | 117929 | 117561 | -0.31% | BIS Blue Island | |
| BKS | 14 | 38369 | 34630 | -9.74% | BKS Berkeley | |
| BPS | 15 | 28915 | 29639 | 2.50% | BPS Bedford Pk | |
| BRS | 16 | 84658 | 88447 | 4.48% | BRS Broadview | |
| BWS | 17 | 71550 | 66507 | -7.05% | BWS Bellwood | |
| BYS | 18 | 330566 | 290810 | -12.03% | BYS Berwyn | |
| BZS | 93 | 201 | 1560 | 676.12% | BZS Brookfield Zoo | |
| CAS | 19 | 4640 | 5443 | 17.31% | CAS Calumet Park | |
| CCS | 20 | 146184 | 142284 | -2.67% | CCS Calumet City | |
| CHS | 21 | 74820 | 67593 | -9.66% | CHS Chicago Heights | |
| CIS | 22 | 210019 | 205557 | -2.12% | CIS Cicero | |
| CNS | 23 | 59461 | 57269 | -3.69% | CNS Clarendon Hills | |
| CRS | 24 | 107236 | 110297 | 2.85% | CRS Chicago Ridge | |
| CTS | 25 | 113355 | 106261 | -6.26% | CTS Crete | |
| CWS | 26 | 46265 | 46363 | 0.21% | CWS Crestwood | |
| CZS | 27 | 13344 | 11379 | -14.73% | CZS Cicero Branch | |
| DGS | 28 | 931004 | 906223 | -2.66% | DGS Downers Grove | |
| DOS | 29 | 75841 | 69325 | -8.59% | DOS Dolton | |
| EHS | 30 | 889241 | 924028 | 3.91% | EHS Elmhurst | |
| EHS | 306 | 135840 | 128552 | -5.37% | EHS Elmhurst self checkout | |
| EPS | 31 | 123627 | 134869 | 9.09% | EPS Elmwood Park | |
| ESS | 32 | 157660 | 154979 | -1.70% | ESS Eisenhower | |
| EVS | 33 | 123709 | 124091 | 0.31% | EVS Evergreen Park | |
| FBS | 34 | 51941 | 54410 | 4.75% | FBS Frankfort (Bkmobile) | |
| FMS | 35 | 95534 | 124559 | 30.38% | FMS Flossmoor | |
| FMS | 356 | 1505 | 34427 | 2187.51% | FMS Flossmoor self-checkout | |
| FPS | 36 | 91587 | 83567 | -8.76% | FPS Forest Park | |
| FRS | 37 | 227156 | 198560 | -12.59% | FRS Frankfort | |
| FRS | 376 | 0 | 28022 | - | FRS Frankfort self-checkout | |
| GAS | 94 | 0 | 3016 | - | GWS Glenwd-Lynwd bkmob | |
| GPS | 38 | 132508 | 124462 | -6.07% | GPS Grande Prairie | |
| GWS | 39 | 50401 | 52764 | 4.69% | GWS Glenwd-Lynwd | |
| HAS | 40 | 50745 | 51998 | 2.47% | HAS Harvey | |
| HDS | 41 | 229804 | 232158 | 1.02% | HDS Hinsdale | |
| HKS | 42 | 50318 | 49901 | -0.83% | HKS Hodgkins | |
| HSS | 43 | 68891 | 71196 | 3.35% | HSS Hillside | |
| HWS | 44 | 313207 | 291311 | -6.99% | HWS Homewood | |
| HWS | 446 | 0 | 2685 | - | HWS Homewood self-check | |
| INS | 45 | 579708 | 565833 | -2.39% | INS Indian Prairie | |
| INS | 456 | 134530 | 113657 | -15.52% | INS Indian Prairie self chekout | |
| JDS | 46 | 38551 | 35108 | -8.93% | JDS Justice | |
| LGS | 47 | 161685 | 139456 | -13.75% | LGS La Grange | |
| LPS | 48 | 108179 | 102957 | -4.83% | LPS La Grange Pk | |
| LYS | 49 | 42858 | 42903 | 0.10% | LYS Lyons | |
| MAS | 91 | 2669 | 4769 | 78.68% | MAS Morton Arboretum | |
| MCS | 50 | 21975 | 20956 | -4.64% | MCS McCook | |
| MDS | 51 | 103100 | 99327 | -3.66% | MDS Midlothian | |
| MKS | 52 | 5898 | 4806 | -18.51% | MKS Anderson/Oglsby | |
| MLS | 53 | 2473 | 4482 | 81.24% | MLS Morton College | |
| MPS | 54 | 59530 | 66091 | 11.02% | MPS Melrose Park | |
| MTS | 55 | 135877 | 143570 | 5.66% | MTS Matteson | |
| MWS | 56 | 50901 | 47396 | -6.89% | MWS Maywood | |
| NLS | 57 | 119504 | 111516 | -6.68% | NLS Northlake | |
| NRS | 58 | 75198 | 72572 | -3.49% | NRS North Riverside | |
| OBS | 59 | 47315 | 15305 | -67.65% | OBS Orland Pk (Bkmobile) | |
| OLS | 60 | 545374 | 536676 | -1.59% | OLS Oak Lawn | |
| ORS | 61 | 413306 | 440123 | 6.49% | ORS Orland Park | |
| ORS | 616 | 31694 | 90851 | 186.65% | ORS Orland Park self chkout | |
| PCS | 62 | 10941 | 9556 | -12.66% | PCS Prairie State College | |
| PFS | 63 | 143966 | 146030 | 1.43% | PFS Park Forest | |
| PHS | 64 | 146643 | 154855 | 5.60% | PHS Palos Heights | |
| PHS | 646 | 1150 | 6527 | 467.57% | PHS Palos Heights self ckout | |
| PPS | 65 | 39784 | 36444 | -8.40% | PPS Palos Park | |
| PSS | 66 | 19366 | 16848 | -13.00% | PSS University Pk | |
| PTS | 67 | 104753 | 107730 | 2.84% | PTS Prairie Trails | |
| PTS | 676 | 69 | 681 | 886.96% | PTS Prairie Trails self-check | |
| RDS | 68 | 25200 | 23567 | -6.48% | RDS Riverdale | |
| RFS | 69 | 140047 | 141431 | 0.99% | RFS River Forest | |
| RGS | 70 | 24535 | 23107 | -5.82% | RGS River Grove | |
| ROS | 71 | 1783 | 1392 | -21.93% | ROS Wm. Leonard | |
| RPS | 72 | 80445 | 75012 | -6.75% | RPS Richton Park | |
| RSS | 73 | 130872 | 134252 | 2.58% | RSS Riverside | |
| RVS | 74 | 10369 | 11338 | 9.35% | RVS Reavis High School | |
| SAS | 75 | 29530 | 31018 | 5.04% | SAS Summit | |
| SFS | 76 | 30114 | 45741 | 51.89% | SFS Stickney-FV | |
| SHS | 77 | 144564 | 130804 | -9.52% | SHS South Holland | |
| SPS | 78 | 67285 | 74005 | 9.99% | SPS Schiller Park | |
| STS | 79 | 48876 | 45624 | -6.65% | STS Steger-So.Chgo. | |
| SVS | 80 | 24178 | 24099 | -0.33% | SVS N.McConathy | |
| TBS | 90 | 28470 | 26268 | -7.73% | TBS Tinley Park (Bkmobile) | |
| TFS | 81 | 152562 | 145352 | -4.73% | TFS Thomas Ford | |
| TPS | 82 | 376758 | 407288 | 8.10% | TPS Tinley Park | |
| TPS | 826 | 3036 | 25228 | 730.96% | TPS Tinley Park self chkout | |
| TTS | 83 | 7630 | 8531 | 11.81% | TTS So. Suburban Coll. | |
| WCS | 84 | 134832 | 133019 | -1.34% | WCS Westchester | |
| WMS | 85 | 118569 | 126762 | 6.91% | WMS Westmont | |
| WOS | 86 | 72098 | 68164 | -5.46% | WOS Worth | |
| WRS | 87 | 516363 | 502888 | -2.61% | WRS Woodridge | |
| SLS | 89 | 5280 | 5967 | 13.01% | SLS (Suburban Library Sys) | |
| TOTAL | 10,949,797 | 10,940,180 | -0.09% | SWAN | ||