| Area | 7/1/2008 | 7/1/2007 | 7/1/2006 | 7/1/2005 | 7/1/2004 | 7/1/2003 | 7/1/2002 | 7/1/2001 | 7/1/2000 | Census 2000 |
| Idaho | 1,523,816 | 1,496,145 | 1,461,183 | 1,424,127 | 1,390,329 | 1,363,010 | 1,341,408 | 1,320,732 | 1,299,474 | 1,293,953 |
|---|---|---|---|---|---|---|---|---|---|---|
| Aberdeen city | 1,749 | 1,754 | 1,767 | 1,790 | 1,795 | 1,814 | 1,818 | 1,835 | 1,837 | 1,840 |
| Acequia city | 132 | 132 | 132 | 132 | 134 | 136 | 138 | 139 | 143 | 144 |
| Albion city | 255 | 251 | 250 | 252 | 254 | 257 | 260 | 262 | 262 | 262 |
| American Falls city | 4,069 | 4,068 | 4,091 | 4,061 | 4,103 | 4,012 | 4,053 | 4,072 | 4,093 | 4,111 |
| Ammon city | 13,646 | 12,846 | 11,932 | 10,779 | 9,639 | 8,575 | 7,737 | 6,896 | 6,462 | 6,187 |
| Arco city | 977 | 977 | 962 | 979 | 981 | 997 | 1,024 | 1,008 | 1,026 | 1,026 |
| Arimo city | 320 | 314 | 320 | 326 | 337 | 340 | 349 | 352 | 347 | 348 |
| Ashton city | 1,073 | 1,086 | 1,094 | 1,105 | 1,135 | 1,126 | 1,114 | 1,120 | 1,127 | 1,129 |
| Athol city | 684 | 687 | 687 | 700 | 696 | 680 | 676 | 678 | 678 | 676 |
| Atomic City city | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Bancroft city | 344 | 345 | 344 | 353 | 362 | 364 | 369 | 380 | 381 | 382 |
| Basalt city | 419 | 417 | 417 | 419 | 419 | 420 | 419 | 420 | 419 | 419 |
| Bellevue city | 2,165 | 2,156 | 2,171 | 2,193 | 2,186 | 2,091 | 1,990 | 1,919 | 1,881 | 1,876 |
| Blackfoot city | 11,012 | 10,850 | 10,770 | 10,662 | 10,589 | 10,589 | 10,515 | 10,526 | 10,484 | 10,419 |
| Bliss city | 247 | 248 | 250 | 254 | 259 | 263 | 265 | 267 | 271 | 275 |
| Bloomington city | 225 | 224 | 225 | 228 | 232 | 233 | 235 | 247 | 251 | 251 |
| Boise City city | 205,314 | 202,736 | 199,986 | 200,124 | 199,060 | 199,555 | 199,431 | 197,639 | 195,509 | 185,787 |
| Bonners Ferry city | 2,596 | 2,633 | 2,669 | 2,668 | 2,659 | 2,629 | 2,605 | 2,589 | 2,631 | 2,515 |
| Bovill city | 287 | 287 | 291 | 294 | 300 | 299 | 303 | 305 | 304 | 305 |
| Buhl city | 4,077 | 4,025 | 3,990 | 3,999 | 3,959 | 3,986 | 3,953 | 3,948 | 3,982 | 3,985 |
| Burley city | 9,105 | 8,964 | 8,904 | 8,986 | 9,029 | 9,164 | 9,245 | 9,340 | 9,345 | 9,316 |
| Butte City city | 72 | 72 | 72 | 73 | 73 | 74 | 76 | 75 | 76 | 76 |
| Caldwell city | 42,331 | 39,767 | 36,901 | 34,577 | 32,919 | 31,508 | 30,121 | 28,868 | 27,651 | 25,967 |
| Cambridge city | 380 | 354 | 359 | 360 | 361 | 363 | 364 | 368 | 371 | 360 |
| Carey city | 511 | 501 | 504 | 509 | 517 | 519 | 519 | 517 | 513 | 513 |
| Cascade city | 991 | 1,002 | 1,004 | 980 | 971 | 968 | 971 | 1,001 | 1,010 | 997 |
| Castleford city | 271 | 270 | 271 | 273 | 272 | 275 | 274 | 274 | 277 | 277 |
| Challis city | 896 | 871 | 854 | 833 | 847 | 844 | 858 | 880 | 907 | 909 |
| Chubbuck city | 11,828 | 11,525 | 11,303 | 10,948 | 10,647 | 10,256 | 10,237 | 10,074 | 9,741 | 9,700 |
| Clark Fork city | 578 | 578 | 570 | 564 | 558 | 553 | 543 | 533 | 532 | 530 |
| Clayton city | 27 | 26 | 26 | 25 | 26 | 25 | 26 | 26 | 27 | 27 |
| Clifton city | 238 | 233 | 225 | 230 | 229 | 225 | 223 | 217 | 214 | 213 |
| Coeur d'Alene city | 43,360 | 42,207 | 41,031 | 39,892 | 38,362 | 37,256 | 36,570 | 35,709 | 35,001 | 34,514 |
| Cottonwood city | 1,041 | 1,029 | 1,015 | 1,011 | 1,053 | 1,017 | 1,013 | 945 | 940 | 944 |
| Council city | 680 | 694 | 701 | 734 | 742 | 757 | 776 | 794 | 817 | 816 |
| Craigmont city | 519 | 517 | 526 | 525 | 531 | 535 | 540 | 531 | 555 | 556 |
| Crouch city | 161 | 164 | 163 | 160 | 161 | 162 | 159 | 156 | 156 | 154 |
| Culdesac city | 376 | 377 | 376 | 377 | 373 | 374 | 371 | 372 | 377 | 378 |
| Dalton Gardens city | 2,389 | 2,381 | 2,364 | 2,382 | 2,345 | 2,295 | 2,286 | 2,279 | 2,284 | 2,278 |
| Dayton city | 442 | 438 | 439 | 448 | 449 | 438 | 441 | 439 | 443 | 444 |
| Deary city | 541 | 537 | 543 | 546 | 553 | 552 | 560 | 565 | 565 | 552 |
| Declo city | 329 | 323 | 321 | 325 | 327 | 331 | 334 | 337 | 337 | 338 |
| Dietrich city | 160 | 159 | 158 | 159 | 154 | 155 | 153 | 152 | 150 | 150 |
| Donnelly city | 142 | 146 | 148 | 145 | 131 | 131 | 132 | 137 | 139 | 138 |
| Dover city | 527 | 526 | 519 | 514 | 508 | 503 | 494 | 486 | 486 | 342 |
| Downey city | 562 | 556 | 575 | 590 | 608 | 611 | 621 | 626 | 613 | 613 |
| Driggs city | 1,362 | 1,302 | 1,263 | 1,209 | 1,184 | 1,180 | 1,192 | 1,172 | 1,171 | 1,100 |
| Drummond city | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
| Dubois city | 616 | 605 | 610 | 601 | 611 | 600 | 651 | 664 | 707 | 647 |
| Eagle city | 19,471 | 19,221 | 18,567 | 17,494 | 16,302 | 15,424 | 14,725 | 13,931 | 12,452 | 11,085 |
| East Hope city | 218 | 217 | 214 | 212 | 210 | 208 | 204 | 201 | 201 | 200 |
| Eden city | 405 | 403 | 407 | 407 | 408 | 406 | 407 | 409 | 412 | 411 |
| Elk River city | 136 | 137 | 139 | 139 | 140 | 141 | 142 | 146 | 155 | 156 |
| Emmett city | 6,357 | 6,325 | 6,235 | 6,088 | 5,960 | 5,914 | 5,802 | 5,755 | 5,683 | 5,490 |
| Fairfield city | 417 | 407 | 395 | 394 | 376 | 388 | 394 | 392 | 388 | 395 |
| Ferdinand city | 145 | 142 | 142 | 141 | 143 | 145 | 147 | 143 | 144 | 145 |
| Fernan Lake Village city | 183 | 184 | 184 | 187 | 186 | 186 | 186 | 188 | 187 | 186 |
| Filer city | 2,141 | 2,071 | 1,987 | 1,892 | 1,846 | 1,811 | 1,773 | 1,758 | 1,753 | 1,620 |
| Firth city | 486 | 484 | 484 | 487 | 487 | 490 | 489 | 491 | 489 | 408 |
| Franklin city | 665 | 655 | 645 | 653 | 657 | 646 | 648 | 640 | 641 | 641 |
| Fruitland city | 4,732 | 4,607 | 4,421 | 4,319 | 4,178 | 4,118 | 4,039 | 3,985 | 3,893 | 3,805 |
| Garden City city | 11,713 | 11,530 | 11,408 | 11,481 | 11,206 | 11,086 | 10,996 | 10,884 | 10,691 | 10,624 |
| Genesee city | 878 | 881 | 895 | 907 | 921 | 920 | 933 | 941 | 943 | 946 |
| Georgetown city | 463 | 468 | 473 | 476 | 489 | 503 | 511 | 533 | 539 | 538 |
| Glenns Ferry city | 1,388 | 1,404 | 1,412 | 1,459 | 1,514 | 1,521 | 1,565 | 1,580 | 1,601 | 1,611 |
| Gooding city | 3,200 | 3,191 | 3,216 | 3,244 | 3,276 | 3,301 | 3,310 | 3,329 | 3,387 | 3,384 |
| Grace city | 939 | 938 | 935 | 946 | 961 | 960 | 974 | 1,001 | 991 | 990 |
| Grand View city | 462 | 459 | 458 | 461 | 466 | 474 | 473 | 476 | 471 | 470 |
| Grangeville city | 3,110 | 3,084 | 3,070 | 3,058 | 3,084 | 3,111 | 3,158 | 3,187 | 3,213 | 3,228 |
| Greenleaf city | 893 | 881 | 883 | 883 | 871 | 874 | 874 | 868 | 864 | 862 |
| Hagerman city | 791 | 769 | 750 | 753 | 766 | 770 | 769 | 761 | 754 | 656 |
| Hailey city | 7,883 | 7,790 | 7,699 | 7,563 | 7,413 | 7,254 | 7,048 | 6,771 | 6,318 | 6,200 |
| Hamer city | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Hansen city | 1,022 | 956 | 953 | 958 | 962 | 973 | 968 | 965 | 969 | 970 |
| Harrison city | 284 | 282 | 280 | 280 | 277 | 273 | 271 | 271 | 270 | 267 |
| Hauser city | 791 | 796 | 797 | 813 | 809 | 791 | 787 | 790 | 788 | 668 |
| Hayden city | 12,873 | 12,619 | 12,258 | 11,820 | 11,083 | 10,421 | 9,978 | 9,623 | 9,369 | 9,159 |
| Hayden Lake city | 560 | 559 | 549 | 550 | 536 | 520 | 515 | 515 | 511 | 494 |
| Hazelton city | 742 | 725 | 704 | 703 | 702 | 696 | 695 | 696 | 692 | 687 |
| Heyburn city | 2,696 | 2,683 | 2,687 | 2,702 | 2,734 | 2,773 | 2,808 | 2,823 | 2,905 | 2,899 |
| Hollister city | 233 | 232 | 233 | 235 | 234 | 237 | 235 | 236 | 237 | 237 |
| Homedale city | 2,471 | 2,473 | 2,485 | 2,490 | 2,493 | 2,515 | 2,516 | 2,545 | 2,533 | 2,528 |
| Hope city | 86 | 86 | 85 | 84 | 83 | 82 | 80 | 79 | 79 | 79 |
| Horseshoe Bend city | 854 | 862 | 868 | 866 | 874 | 877 | 865 | 851 | 849 | 770 |
| Huetter city | 97 | 97 | 97 | 99 | 98 | 96 | 96 | 96 | 96 | 96 |
| Idaho City city | 476 | 476 | 478 | 468 | 477 | 481 | 473 | 465 | 462 | 458 |
| Idaho Falls city | 54,334 | 53,260 | 52,292 | 51,872 | 51,831 | 51,323 | 51,067 | 51,178 | 51,146 | 50,730 |
| Inkom city | 725 | 695 | 703 | 710 | 734 | 737 | 756 | 762 | 746 | 738 |
| Iona city | 1,331 | 1,309 | 1,283 | 1,264 | 1,257 | 1,234 | 1,227 | 1,228 | 1,228 | 1,201 |
| Irwin city | 165 | 158 | 154 | 153 | 154 | 155 | 156 | 157 | 157 | 157 |
| Island Park city | 287 | 280 | 276 | 274 | 277 | 270 | 268 | 267 | 268 | 215 |
| Jerome city | 9,157 | 8,817 | 8,516 | 8,372 | 8,300 | 8,181 | 8,103 | 8,101 | 8,125 | 7,780 |
| Juliaetta city | 577 | 579 | 585 | 588 | 603 | 602 | 611 | 617 | 617 | 609 |
| Kamiah city | 1,088 | 1,088 | 1,104 | 1,099 | 1,108 | 1,118 | 1,122 | 1,105 | 1,154 | 1,160 |
| Kellogg city | 2,228 | 2,222 | 2,247 | 2,237 | 2,225 | 2,247 | 2,278 | 2,354 | 2,415 | 2,395 |
| Kendrick city | 347 | 347 | 351 | 355 | 363 | 361 | 366 | 368 | 368 | 369 |
| Ketchum city | 3,272 | 3,217 | 3,199 | 3,131 | 3,121 | 3,108 | 3,088 | 3,069 | 3,011 | 3,003 |
| Kimberly city | 3,148 | 3,014 | 2,774 | 2,689 | 2,681 | 2,692 | 2,672 | 2,628 | 2,629 | 2,614 |
| Kooskia city | 655 | 650 | 647 | 645 | 647 | 655 | 667 | 674 | 673 | 675 |
| Kootenai city | 498 | 498 | 491 | 486 | 480 | 476 | 467 | 460 | 460 | 441 |
| Kuna city | 13,354 | 12,753 | 11,905 | 10,551 | 9,921 | 9,392 | 8,341 | 7,504 | 6,443 | 5,382 |
| Lapwai city | 1,120 | 1,122 | 1,119 | 1,120 | 1,118 | 1,122 | 1,112 | 1,113 | 1,132 | 1,134 |
| Lava Hot Springs city | 492 | 485 | 500 | 515 | 529 | 532 | 539 | 537 | 522 | 521 |
| Leadore city | 86 | 85 | 86 | 86 | 87 | 86 | 87 | 87 | 89 | 90 |
| Lewiston city | 31,764 | 31,693 | 31,461 | 31,180 | 31,009 | 30,951 | 30,517 | 30,463 | 30,881 | 30,904 |
| Lewisville city | 525 | 508 | 495 | 489 | 483 | 477 | 473 | 466 | 468 | 467 |
| Mackay city | 548 | 536 | 529 | 521 | 530 | 531 | 539 | 551 | 565 | 566 |
| Malad City city | 2,084 | 2,058 | 2,053 | 2,074 | 2,059 | 2,075 | 2,109 | 2,146 | 2,156 | 2,158 |
| Malta city | 173 | 170 | 169 | 170 | 171 | 174 | 175 | 177 | 177 | 177 |
| Marsing city | 945 | 933 | 928 | 942 | 959 | 955 | 933 | 923 | 897 | 890 |
| McCall city | 2,593 | 2,587 | 2,518 | 2,356 | 2,249 | 2,172 | 2,105 | 2,113 | 2,092 | 2,084 |
| McCammon city | 821 | 808 | 817 | 815 | 825 | 816 | 832 | 833 | 814 | 805 |
| Melba city | 560 | 549 | 548 | 539 | 542 | 518 | 514 | 466 | 455 | 439 |
| Menan city | 716 | 708 | 703 | 714 | 707 | 709 | 706 | 700 | 707 | 707 |
| Meridian city | 66,916 | 64,615 | 60,436 | 52,908 | 46,152 | 42,509 | 40,580 | 38,734 | 36,780 | 34,919 |
| Middleton city | 5,594 | 5,361 | 4,870 | 4,510 | 4,171 | 3,788 | 3,416 | 3,314 | 3,157 | 2,978 |
| Midvale city | 209 | 210 | 214 | 215 | 216 | 213 | 209 | 207 | 209 | 176 |
| Minidoka city | 118 | 117 | 117 | 118 | 120 | 122 | 123 | 125 | 128 | 129 |
| Montpelier city | 2,356 | 2,364 | 2,391 | 2,413 | 2,494 | 2,556 | 2,599 | 2,718 | 2,781 | 2,785 |
| Moore city | 185 | 185 | 184 | 188 | 188 | 191 | 196 | 193 | 196 | 196 |
| Moscow city | 22,798 | 22,699 | 22,898 | 22,702 | 22,333 | 22,037 | 21,622 | 21,721 | 21,342 | 21,291 |
| Mountain Home city | 12,382 | 12,201 | 11,859 | 11,765 | 11,746 | 11,626 | 11,813 | 11,713 | 11,526 | 11,143 |
| Moyie Springs city | 727 | 721 | 712 | 705 | 691 | 672 | 661 | 658 | 659 | 656 |
| Mud Lake city | 286 | 276 | 269 | 265 | 266 | 269 | 270 | 266 | 270 | 270 |
| Mullan city | 748 | 752 | 770 | 764 | 766 | 774 | 785 | 812 | 834 | 840 |
| Murtaugh city | 149 | 143 | 139 | 137 | 138 | 140 | 138 | 138 | 139 | 139 |
| Nampa city | 80,362 | 78,902 | 75,834 | 72,112 | 68,587 | 65,428 | 61,759 | 58,288 | 54,772 | 51,867 |
| New Meadows city | 491 | 490 | 467 | 482 | 485 | 495 | 507 | 515 | 528 | 533 |
| New Plymouth city | 1,448 | 1,440 | 1,390 | 1,369 | 1,355 | 1,375 | 1,388 | 1,393 | 1,399 | 1,400 |
| Newdale city | 349 | 354 | 356 | 360 | 366 | 362 | 358 | 357 | 357 | 358 |
| Nezperce city | 486 | 486 | 494 | 493 | 497 | 500 | 505 | 498 | 522 | 523 |
| Notus city | 623 | 600 | 542 | 535 | 506 | 503 | 493 | 473 | 461 | 458 |
| Oakley city | 707 | 695 | 691 | 701 | 698 | 708 | 715 | 722 | 722 | 668 |
| Oldtown city | 207 | 207 | 205 | 203 | 200 | 199 | 195 | 192 | 191 | 190 |
| Onaway city | 217 | 217 | 220 | 222 | 227 | 226 | 228 | 230 | 229 | 230 |
| Orofino city | 3,045 | 3,071 | 3,096 | 3,107 | 3,122 | 3,140 | 3,130 | 3,200 | 3,245 | 3,247 |
| Osburn city | 1,389 | 1,390 | 1,427 | 1,418 | 1,419 | 1,433 | 1,451 | 1,502 | 1,539 | 1,545 |
| Oxford city | 52 | 52 | 52 | 53 | 53 | 52 | 52 | 52 | 53 | 53 |
| Paris city | 483 | 492 | 495 | 498 | 516 | 529 | 539 | 562 | 575 | 576 |
| Parker city | 315 | 317 | 320 | 320 | 325 | 322 | 319 | 318 | 318 | 319 |
| Parma city | 1,870 | 1,824 | 1,810 | 1,784 | 1,782 | 1,793 | 1,800 | 1,794 | 1,777 | 1,771 |
| Paul city | 919 | 915 | 917 | 923 | 931 | 949 | 965 | 974 | 1,007 | 998 |
| Payette city | 7,637 | 7,608 | 7,495 | 7,423 | 7,358 | 7,368 | 7,329 | 7,275 | 7,245 | 7,054 |
| Peck city | 184 | 185 | 185 | 185 | 183 | 184 | 182 | 183 | 186 | 186 |
| Pierce city | 527 | 532 | 539 | 542 | 546 | 555 | 562 | 579 | 612 | 617 |
| Pinehurst city | 1,589 | 1,553 | 1,578 | 1,545 | 1,543 | 1,558 | 1,575 | 1,627 | 1,658 | 1,661 |
| Placerville city | 57 | 58 | 59 | 59 | 60 | 61 | 60 | 60 | 60 | 60 |
| Plummer city | 997 | 989 | 991 | 977 | 966 | 967 | 969 | 978 | 1,002 | 990 |
| Pocatello city | 54,901 | 54,624 | 53,971 | 53,339 | 52,910 | 52,527 | 52,205 | 51,931 | 51,671 | 51,466 |
| Ponderay city | 696 | 696 | 687 | 680 | 673 | 667 | 655 | 644 | 641 | 638 |
| Post Falls city | 26,460 | 25,401 | 24,409 | 23,226 | 21,499 | 20,185 | 19,298 | 18,734 | 18,120 | 17,247 |
| Potlatch city | 742 | 741 | 751 | 758 | 775 | 772 | 782 | 787 | 788 | 791 |
| Preston city | 5,059 | 4,929 | 4,891 | 4,874 | 4,845 | 4,778 | 4,786 | 4,726 | 4,695 | 4,682 |
| Priest River city | 1,913 | 1,912 | 1,887 | 1,867 | 1,845 | 1,830 | 1,796 | 1,766 | 1,766 | 1,754 |
| Rathdrum city | 6,821 | 6,602 | 6,262 | 5,704 | 5,579 | 5,289 | 5,091 | 4,927 | 4,855 | 4,816 |
| Reubens city | 69 | 69 | 70 | 70 | 71 | 70 | 70 | 69 | 72 | 72 |
| Rexburg city | 28,028 | 27,574 | 27,058 | 26,458 | 24,897 | 22,152 | 18,847 | 18,022 | 17,805 | 17,257 |
| Richfield city | 414 | 417 | 416 | 422 | 414 | 418 | 415 | 414 | 411 | 412 |
| Rigby city | 3,394 | 3,310 | 3,230 | 3,228 | 3,008 | 3,040 | 3,021 | 2,994 | 3,033 | 2,998 |
| Riggins city | 418 | 415 | 413 | 411 | 412 | 417 | 425 | 429 | 430 | 410 |
| Ririe city | 534 | 533 | 533 | 542 | 550 | 556 | 559 | 558 | 565 | 545 |
| Roberts city | 642 | 640 | 640 | 653 | 657 | 665 | 668 | 661 | 651 | 647 |
| Rockland city | 313 | 314 | 319 | 320 | 323 | 310 | 311 | 312 | 314 | 316 |
| Rupert city | 5,082 | 5,060 | 5,073 | 5,103 | 5,195 | 5,296 | 5,385 | 5,447 | 5,630 | 5,645 |
| Salmon city | 2,986 | 2,952 | 2,982 | 2,993 | 2,995 | 2,986 | 3,002 | 3,017 | 3,089 | 3,122 |
| Sandpoint city | 8,337 | 8,205 | 8,005 | 7,911 | 7,504 | 7,277 | 7,097 | 6,914 | 6,873 | 6,835 |
| Shelley city | 4,257 | 4,160 | 4,122 | 4,088 | 3,928 | 3,883 | 3,843 | 3,853 | 3,858 | 3,813 |
| Shoshone city | 1,564 | 1,571 | 1,529 | 1,536 | 1,475 | 1,468 | 1,442 | 1,428 | 1,411 | 1,398 |
| Smelterville city | 598 | 597 | 604 | 602 | 598 | 605 | 613 | 634 | 649 | 651 |
| Soda Springs city | 3,072 | 3,088 | 3,098 | 3,171 | 3,247 | 3,255 | 3,288 | 3,382 | 3,377 | 3,381 |
| Spencer city | 33 | 33 | 33 | 32 | 33 | 32 | 35 | 36 | 38 | 38 |
| Spirit Lake city | 1,730 | 1,702 | 1,612 | 1,504 | 1,461 | 1,443 | 1,426 | 1,416 | 1,399 | 1,376 |
| St. Anthony city | 3,401 | 3,407 | 3,384 | 3,376 | 3,448 | 3,433 | 3,319 | 3,333 | 3,335 | 3,342 |
| St. Charles city | 128 | 130 | 132 | 134 | 139 | 143 | 144 | 152 | 156 | 156 |
| St. Maries city | 2,644 | 2,619 | 2,623 | 2,596 | 2,561 | 2,564 | 2,577 | 2,596 | 2,664 | 2,652 |
| Stanley city | 106 | 104 | 99 | 95 | 96 | 93 | 94 | 97 | 100 | 100 |
| Star city | 5,065 | 4,756 | 4,048 | 2,825 | 2,482 | 2,260 | 2,188 | 2,111 | 1,930 | 1,795 |
| State Line city | 60 | 61 | 61 | 62 | 62 | 61 | 61 | 61 | 60 | 28 |
| Stites city | 225 | 223 | 222 | 221 | 222 | 220 | 222 | 224 | 225 | 226 |
| Sugar City city | 1,540 | 1,521 | 1,509 | 1,478 | 1,448 | 1,394 | 1,311 | 1,294 | 1,289 | 1,242 |
| Sun Valley city | 1,466 | 1,441 | 1,442 | 1,436 | 1,449 | 1,458 | 1,455 | 1,452 | 1,434 | 1,427 |
| Swan Valley city | 244 | 238 | 232 | 227 | 223 | 218 | 216 | 215 | 214 | 213 |
| Tensed city | 125 | 124 | 125 | 122 | 120 | 121 | 122 | 123 | 126 | 126 |
| Teton city | 661 | 662 | 661 | 669 | 681 | 674 | 669 | 667 | 666 | 569 |
| Tetonia city | 229 | 234 | 240 | 241 | 249 | 255 | 258 | 249 | 248 | 247 |
| Troy city | 777 | 776 | 785 | 792 | 810 | 806 | 815 | 821 | 821 | 798 |
| Twin Falls city | 42,197 | 41,387 | 40,161 | 38,627 | 37,720 | 36,725 | 35,712 | 35,059 | 34,937 | 34,469 |
| Ucon city | 1,082 | 1,070 | 1,054 | 1,003 | 974 | 960 | 945 | 946 | 946 | 943 |
| Victor city | 1,817 | 1,693 | 1,581 | 1,505 | 1,359 | 1,250 | 1,196 | 1,064 | 1,033 | 840 |
| Wallace city | 861 | 865 | 888 | 883 | 878 | 887 | 899 | 930 | 956 | 960 |
| Wardner city | 197 | 196 | 198 | 198 | 197 | 199 | 202 | 209 | 214 | 215 |
| Warm River city | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Weippe city | 370 | 375 | 380 | 382 | 382 | 380 | 382 | 392 | 413 | 416 |
| Weiser city | 5,290 | 5,302 | 5,350 | 5,341 | 5,333 | 5,317 | 5,342 | 5,388 | 5,423 | 5,343 |
| Wendell city | 2,418 | 2,405 | 2,387 | 2,356 | 2,341 | 2,341 | 2,352 | 2,344 | 2,372 | 2,338 |
| Weston city | 437 | 430 | 428 | 437 | 438 | 427 | 433 | 431 | 426 | 425 |
| White Bird city | 105 | 105 | 104 | 104 | 104 | 103 | 104 | 105 | 106 | 106 |
| Wilder city | 1,473 | 1,430 | 1,434 | 1,438 | 1,444 | 1,459 | 1,471 | 1,472 | 1,465 | 1,462 |
| Winchester city | 291 | 291 | 296 | 296 | 297 | 299 | 302 | 296 | 308 | 308 |
| Worley city | 219 | 218 | 218 | 222 | 221 | 220 | 221 | 223 | 223 | 223 |
Source: Population Division, U.S. Census Bureau