The ASA membership year closes on September 30 of each year. The following table presents section membership counts (alphabetically by section) as of September 30 for the last decade.
| Totals | 19,855 | 20,269 | 21,366 | 23,120 | 24,236 | 25,137 | 24,995 | 26,329 | 25,464 | 27,827 | 27,309 |
| Section | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 |
| Aging | 490 | 498 | 484 | 598 | 603 | 614 | 606 | 624 | 605 | 612 | 620 |
| Alcohol & Drugs | 243 | 306 | 303 | 301 | 304 | 303 | 288 | 255 | 213 | 226 | 200 |
| Altruism, Morality & Social Solidarity | - | - | - | - | - | - | - | 139 | 216 | 320 | 305 |
| Animals & Society | 308 | 218 | 197 | 209 | 208 | 218 | 176 | 180 | 167 | 172 | 149 |
| Asia/Asian American | 317 | 328 | 321 | 365 | 379 | 398 | 368 | 405 | 351 | 377 | 337 |
| Body and Embodiment | - | - | - | - | - | - | - | 302 | 295 | 307 | 306 |
| Children & Youth | 345 | 341 | 334 | 418 | 417 | 413 | 419 | 433 | 434 | 447 | 409 |
| Collective Behavior/Social Movements | 606 | 614 | 643 | 708 | 761 | 857 | 836 | 825 | 767 | 874 | 841 |
| Communication and Information Technology | 147 | 185 | 253 | 301 | 301 | 307 | 318 | 317 | 318 | 323 | 325 |
| Community & Urban | 556 | 615 | 696 | 721 | 759 | 764 | 727 | 695 | 659 | 696 | 619 |
| Comparative & Historical | 547 | 563 | 629 | 693 | 710 | 741 | 730 | 765 | 693 | 708 | 710 |
| Consumers and Consumption | - | - | - | - | - | - | - | - | - | - | 322 |
| Crime, Law & Deviance | 598 | 626 | 658 | 689 | 701 | 739 | 701 | 694 | 624 | 633 | 612 |
| Culture | 889 | 946 | 976 | 1,063 | 1,131 | 1,180 | 1,198 | 1,227 | 1,132 | 1,228 | 1,181 |
| Sociology of Development | - | - | - | - | - | - | - | - | - | 357 | 421 |
| Disability & Society | - | - | - | - | - | - | 165 | 235 | 331 | 308 | 264 |
| Economic | 505 | 548 | 614 | 674 | 717 | 776 | 780 | 823 | 836 | 872 | 823 |
| Education | 622 | 653 | 718 | 747 | 796 | 809 | 812 | 847 | 813 | 862 | 818 |
| Emotions | 245 | 265 | 259 | 262 | 288 | 281 | 278 | 270 | 262 | 269 | 274 |
| Environment & Technology | 409 | 417 | 377 | 365 | 406 | 419 | 461 | 478 | 463 | 473 | 491 |
| Ethnomethodology | 153 | 220 | 306 | 207 | 192 | 201 | 189 | 199 | 157 | 153 | 129 |
| Evolution, Biology & Society | - | - | - | 157 | 336 | 245 | 203 | 183 | 159 | 158 | 174 |
| Family | 717 | 731 | 719 | 772 | 819 | 842 | 817 | 822 | 801 | 809 | 754 |
| Global & Transnational Sociology | - | - | - | - | - | - | - | - | 516 | 649 | 627 |
| History of Sociology | 164 | 200 | 179 | 233 | 234 | 219 | 212 | 213 | 207 | 199 | 199 |
| Human Rights | - | - | - | - | - | - | 251 | 321 | 290 | 302 | 321 |
| Inequality, Poverty and Mobility | - | - | - | - | - | - | - | - | - | 545 | 671 |
| International Migration | 349 | 350 | 401 | 436 | 496 | 557 | 561 | 607 | 579 | 630 | 593 |
| Labor & Labor Movements | 341 | 315 | 341 | 371 | 423 | 429 | 424 | 415 | 352 | 393 | 435 |
| Latino/a | 245 | 270 | 312 | 337 | 349 | 346 | 349 | 378 | 325 | 351 | 318 |
| Law | 317 | 316 | 338 | 412 | 412 | 411 | 409 | 422 | 442 | 414 | 423 |
| Marxist | 320 | 410 | 412 | 407 | 410 | 408 | 414 | 401 | 339 | 343 | 311 |
| Mathematical | 186 | 196 | 179 | 196 | 222 | 212 | 211 | 225 | 226 | 231 | 220 |
| Medical | 1,003 | 1,010 | 1,013 | 1,027 | 1,010 | 1,063 | 1,023 | 1,044 | 1,019 | 1,034 | 1,009 |
| Mental Health | 389 | 399 | 417 | 425 | 411 | 433 | 408 | 410 | 418 | 457 | 428 |
| Methodology | 384 | 392 | 381 | 401 | 407 | 402 | 407 | 425 | 419 | 430 | 434 |
| Organizations, Occupations & Work | 985 | 980 | 948 | 981 | 1,046 | 1,057 | 1,024 | 1,025 | 944 | 961 | 996 |
| Peace, War & Social Conflict | 255 | 276 | 317 | 316 | 316 | 344 | 321 | 330 | 313 | 307 | 302 |
| Political Economy of the World System | 411 | 402 | 419 | 428 | 440 | 467 | 421 | 431 | 386 | 430 | 412 |
| Political Sociology | 602 | 599 | 656 | 755 | 771 | 844 | 834 | 869 | 786 | 884 | 858 |
| Population | 418 | 429 | 440 | 444 | 460 | 488 | 472 | 512 | 499 | 520 | 490 |
| Race, Gender & Class | 787 | 787 | 804 | 848 | 930 | 986 | 943 | 965 | 900 | 999 | 942 |
| Racial & Ethnic Minorities | 647 | 685 | 689 | 820 | 810 | 879 | 818 | 900 | 820 | 864 | 811 |
| Rationality & Society | 160 | 183 | 170 | 174 | 162 | 164 | 152 | 148 | 151 | 165 | 162 |
| Religion | 496 | 510 | 540 | 610 | 654 | 670 | 655 | 698 | 686 | 672 | 643 |
| Science, Knowledge & Technology | 441 | 388 | 413 | 418 | 467 | 483 | 495 | 487 | 477 | 498 | 496 |
| Sex & Gender | 1,064 | 1,038 | 1,044 | 1,072 | 1,149 | 1,210 | 1,165 | 1,231 | 1,122 | 1,190 | 1,119 |
| Sexualities | 296 | 350 | 367 | 399 | 434 | 459 | 458 | 486 | 442 | 507 | 485 |
| Social Psychology | 623 | 627 | 618 | 374 | 664 | 689 | 651 | 663 | 634 | 673 | 692 |
| Sociological Practice and Public Sociology | 204 | 213 | 216 | 214 | 219 | 232 | 215 | 334 | 311 | 332 | 333 |
| Teaching & Learning | 460 | 546 | 588 | 653 | 681 | 735 | 791 | 813 | 747 | 804 | 801 |
| Theory | 642 | 637 | 677 | 819 | 829 | 825 | 838 | 858 | 818 | 859 | 802 |