Size Categories of Local Sections

ACS Local Sections

Membership Counts as of 12/31/10

Very Large | Large | Medium Large | Medium | Medium Small | Small

Very Large (3,200+ members)
LS_ID	Local Section	# of members
601	California	3,750
315	Chemical Society of Washington	4,185
501	Chicago	4,634
108	New York	4,162
303	North Jersey	5,576
109	Northeastern	7,290
304	Philadelphia	5,258
628	Santa Clara Valley	3,352

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Large Local Sections (1,600 - 3,199 members)
LS_ID	Local Section	# of members
558	Colorado	2,392
102	Connecticut Valley	2,086
300	Delaware	1,713
414	Georgia	1,983
436	Greater Houston	2,724
301	Maryland	2,148
513	Minnesota	2,272
426	North Carolina	2,423
215	Pittsburgh	1,874
621	Puget Sound	1,999
626	San Diego	2,825
633	Southern California	2,613
523	St. Louis	1,707

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Medium Large Local Sections (800 -1,599 members)
LS_ID	Local Section	# of members
557	Central New Mexico	825
446	Central Texas	858
202	Cincinnati	1,493
203	Cleveland	1,024
204	Columbus	1,227
452	Dallas-Fort Worth	1,537
207	Detroit	1,267
104	Eastern New York	1,090
413	Florida	931
233	Indiana	1,442
120	Lehigh Valley	947
512	Milwaukee	875
236	Nashville	805
107	New Haven	924
616	Orange County	1,286
445	Puerto Rico	1,238
118	Rochester	827
623	Sacramento	932
624	Salt Lake	834
409	South Florida	1,210
246	Virginia	1,451
442	Western Carolinas	827
536	Wisconsin	862

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Medium Local Sections (400 - 799 members)
LS_ID	Local Section	# of members
200	Akron	788
400	Alabama	502
500	Ames	401
403	Baton Rouge	482
644	California Los Padres	653
405	Carolina-Piedmont	695
602	Central Arizona	759
541	Central Arkansas	413
101	Central Massachusetts	664
407	Central North Carolina	706
122	Central Pennsylvania	598
206	Dayton	478
556	East Central Illinois	539
218	East Tennessee	625
220	Huron Valley	700
505	Iowa	429
230	Kalamazoo	469
508	Kansas City	719
419	Louisiana	625
211	Midland	710
422	Mississippi	554
545	Oklahoma	490
617	Oregon	465
411	Orlando	550
620	Portland	749
305	Princeton	669
239	Purdue	518
111	Rhode Island	568
622	Richland	546
447	San Antonio	484
627	San Gorgonio	771
435	South Carolina	733
308	Southeastern Pennsylvania	697
632	Southern Arizona	574
240	St. Joseph Valley	424
112	Syracuse	491
406	Tampa Bay	716
450	Texas A&M	439
307	Trenton	783
205	Virginia Blue Ridge	587
113	Western Connecticut	756
119	Western New York	782

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Medium Small Local Sections (200 - 399 members)
LS_ID	Local Section	# of members
402	Auburn	270
404	Brazosport	255
641	Central Utah	233
217	Chattanooga	219
410	Coastal Georgia	225
103	Cornell	297
116	Corning	253
540	Decatur-Springfield	200
451	East Texas	211
412	Eastern North Carolina	267
114	Green Mountain	263
245	Hampton Roads	288
608	Hawaii	250
518	Illinois Heartland	253
417	Jacksonville	233
506	Joliet	281
228	Lexington	365
229	Louisville	394
105	Maine	373
235	Memphis	380
231	Michigan State University	395
106	Mid-Hudson	394
302	Monmouth County	327
612	Montana	278
514	Nebraska	301
425	North Alabama	222
427	Northeast Georgia	369
237	Northeast Tennessee	353
515	Northeast Wisconsin	264
225	Northern West Virginia	247
521	Red River Valley	237
559	Rio Grande Valley	224
434	Savannah River	293
524	Sioux Valley	220
306	South Jersey	331
448	South Texas	216
241	Southern Indiana	243
600	Southern Nevada	253
121	Susquehanna Valley	288
219	Toledo	356
546	Tulsa	218
531	University of Missouri	239
530	Wakarusa Valley	300
637	Washington-Idaho Border	234
232	Western Michigan	384
535	Wichita	219

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Small Local Section (50-199 members)
LS_ID	Local Section	# of members
643	Alaska	128
100	Binghamton	191
227	Central Ohio Valley	140
539	Central Wisconsin	140
208	Erie	160
453	Heart O' Texas	152
609	Idaho	164
502	Illinois-Iowa	190
209	Indiana-Kentucky Border	157
610	Inland Northwest	118
224	Kanawha Valley	176
509	Kansas State University	118
234	Kentucky Lake	194
537	LaCrosse-Winona	111
510	Lake Superior	128
520	Mark Twain	115
454	Middle Georgia	138
423	Mobile	152
611	Mojave Desert	158
526	Mo-Kan-Ok, The Tri-State	103
238	Northeastern Indiana	111
544	Northern Oklahoma	191
212	Northeastern Ohio	192
110	Northern New York	174
210	Northwest Central Ohio	125
401	Northwest Louisiana	102
314	Ocean County	174
420	Ole Miss	195
517	Omaha	195
430	Ouachita Valley	96
548	Ozark	157
549	Panhandle Plains	66
213	Penn-Ohio Border	173
244	Penn-York	76
431	Pensacola	153
550	Permian Basin	106
547	Rock River	184
433	Sabine-Neches	91
607	San Joaquin Valley	136
629	Sierra Nevada	184
645	Snake River	130
525	South Central Missouri	126
551	South Plains	164
527	Southern Illinois	137
416	Southwest Georgia	141
437	Southwest Louisiana	127
538	University of Arkansas	150
221	Upper Ohio Valley	158
532	Upper Peninsula	87
243	Wabash Valley	110
226	Western Maryland	122
553	Wichita Falls-Duncan	89
444	Wilson Dam	55
223	Wooster	115
639	Wyoming	175

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