For the fifth month in a row, registered Republicans in Iowa outnumber registered Democrats. The latest figures from the Iowa Secretary of State’s office (pdf) show 659,838 active no-party voters statewide, 620,584 active Republicans, and 598,995 active Democrats.

After the jump I’ve posted the latest active voter registration numbers in all 99 Iowa counties, grouped by Congressional district. The most evenly-split county is still Decatur in south-central Iowa, with 1,723 registered Democrats, 1,791 Republicans, and 1,751 no-party voters as of August 2.

Any comments about the 2012 elections in Iowa are welcome in this thread.  

Active voter registration numbers as of August 2012

IA-01

County	Democrats	Republicans	no-party voters
Allamakee	2,188	4,345	3,060
Benton	4,711	5,081	7,244
Black Hawk	26,462	19,926	28,137
Bremer	3,638	5,013	6,910
Buchanan	3,937	3,221	6,152
Clayton	3,316	3,202	4,517
Delaware	2,600	3,911	4,726
Dubuque	24,672	14,555	21,677
Fayette	3,662	4,121	3,919
Howard	1,947	1,485	2,505
Iowa	2,801	3,712	4,694
Jackson	5,931	2,697	5,440
Jones	3,531	3,689	5,616
Linn	47,320	38,115	47,891
Marshall	7,382	8,013	9,035
Mitchell	1,814	2,563	2,646
Poweshiek	3,444	3,752	4,577
Tama	3,224	3,451	4,157
Winnishiek	3,293	4,392	4,540
Worth	1,594	1,823	1,967
total	157,467	137,067	179,410

IA-02

County	Democrats	Republicans	no-party voters
Appanoose	2,712	2,916	2,982
Cedar	3,122	3,650	4,421
Clarke	1,635	1,816	2,165
Clinton	10,868	7,360	12,577
Davis	1,955	1,519	1,372
Decatur	1,723	1,791	1,751
Des Moines	11,388	6,081	7,961
Henry	2,944	5,441	4,768
Jasper	8,673	7,185	7,178
Jefferson	3,166	3,599	3,275
Johnson	36,142	17,575	27,459
Keokuk	2,365	2,343	2,215
Lee	9,964	4,332	7,913
Louisa	1,840	2,520	2,525
Lucas	1,421	2,102	2,010
Mahaska	3,019	5,875	4,665
Marion	5,374	9,086	6,836
Monroe	1,770	1,495	1,422
Muscatine	7,622	8,271	10,107
Scott	33,180	29,858	42,797
Van Buren	1,076	2,220	1,606
Wapello	9,491	5,287	6,627
Washington	2,904	5,795	4,674
Wayne	1,008	1,355	1,093
total	165,362	139,472	170,399

IA-03

County	Democrats	Republicans	no-party voters
Adair	1,125	2,034	1,933
Adams	696	961	1,119
Cass	1,620	4,922	2,985
Dallas	9,590	15,613	15,847
Fremont	1,338	2,186	1,817
Guthrie	2,039	2,755	2,739
Madison	3,023	3,977	3,682
Mills	1,886	4,749	3,004
Montgomery	1,060	3,925	1,840
Page	1,631	4,411	3,483
Polk	96,799	80,481	71,953
Pottawattamie	15,631	20,950	17,113
Ringgold	883	1,479	701
Taylor	793	2,002	1,301
Union	1,738	2,849	2,856
Warren	9,674	10,454	9,860
total	149,526	163,748	142,233

IA-04

County	Democrats	Republicans	no-party voters
Audubon	1,320	1,610	1,353
Boone	5,259	5,571	6,347
Buena Vista	2,800	3,933	4,425
Butler	1,739	4,604	3,094
Calhoun	1,431	2,374	2,658
Carroll	4,211	4,019	6,180
Cerro Gordo	9,603	8,088	12,323
Cherokee	2,043	3,193	3,216
Chickasaw	2,998	2,210	3,607
Clay	2,641	4,585	4,287
Crawford	2,641	3,129	3,366
Dickinson	2,660	5,283	4,564
Emmet	2,242	1,700	3,090
Floyd	3,075	2,719	4,485
Franklin	1,246	3,110	2,231
Greene	2,063	2,133	2,233
Grundy	1,468	4,126	2,957
Hamilton	2,755	3,607	3,628
Hancock	1,597	3,313	2,884
Hardin	2,663	4,661	3,821
Harrison	2,495	3,504	2,384
Humboldt	1,377	2,509	2,424
Ida	969	2,172	1,893
Kossuth	3,521	3,420	4,095
Lyon	905	5,407	1,648
Monona	2,118	1,896	2,379
O’Brien	1,354	5,262	2,713
Osceola	515	2,612	1,050
Palo Alto	2,450	1,567	2,104
Plymouth	3,330	7,920	5,695
Pocahontas	1,127	1,745	2,173
Sac	1,367	3,091	2,536
Shelby	2,058	3,820	2,768
Sioux	1,575	14,224	3,484
Story	14,664	14,937	17,688
Webster	8,779	6,854	8,314
Winnebago	1,555	3,046	2,550
Woodbury	18,117	18,826	18,578
Wright	1,909	3,517	2,571
total	126,640	180,297	167,796