Reformed Church in America Counties (1990) [ Metro Areas | States ]
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The Reformed Church in America, the oldest continuously existing Protestant church in the United States, perpetuates the religious life of the Dutch Reformed settlement of New Amsterdam (New York) in the seventeenth century.

Using data from the 1980-2010 Religious Congregations and Membership Studies, this list ranks U.S. counties on the highest total number of adherents and the highest percent of the population in the Reformed Church in America. You can sort the list by clicking on the column headings.

Congregational "Adherents" include all full members, their children, and others who regularly attend services. "Percent" is the percentage of the total population that belongs to that denomination. Note: Adherents are sometimes residents of a county different than the location of their congregation.

[ More information on the data source ]

Complete List

Ranking County   [Download CSV]AdherentsPercent
151 Ada County, Idaho
--
--
151 Adams County, Colorado
--
--
147 Alameda County, California
389
0.03
53 Albany County, New York
6,269
2.14
5 Allegan County, Michigan
15,192
16.79
151 Allen County, Indiana
--
--
64 Antrim County, Michigan
296
1.63
151 Arapahoe County, Colorado
--
--
16 Aurora County, South Dakota
239
7.62
113 Barnes County, North Dakota
56
0.45
49 Barry County, Michigan
1,172
2.34
69 Bergen County, New Jersey
12,596
1.53
133 Berrien County, Michigan
293
0.18
97 Black Hawk County, Iowa
868
0.7
14 Bon Homme County, South Dakota
574
8.1
142 Bronx County, New York
1,001
0.08
73 Brookings County, South Dakota
362
1.44
144 Broward County, Florida
744
0.06
102 Bucks County, Pennsylvania
3,297
0.61
85 Burleigh County, North Dakota
607
1.01
146 Burlington County, New Jersey
152
0.04
9 Butler County, Iowa
1,776
11.29
95 Caddo County, Oklahoma
213
0.72
136 Calhoun County, Michigan
186
0.14
104 Carroll County, Illinois
97
0.58
135 Cascade County, Montana
120
0.15
140 Cass County, North Dakota
104
0.1
120 Cayuga County, New York
298
0.36
93 Cerro Gordo County, Iowa
357
0.76
36 Charles Mix County, South Dakota
363
3.98
47 Charlevoix County, Michigan
567
2.64
114 Chautauqua County, New York
624
0.44
12 Chippewa County, Minnesota
1,180
8.92
30 Clark County, South Dakota
194
4.41
39 Clay County, Iowa
678
3.86
109 Clinton County, Iowa
249
0.49
114 Clinton County, Michigan
255
0.44
117 Collin County, Texas
1,085
0.41
21 Columbia County, New York
3,502
5.56
79 Columbia County, Wisconsin
564
1.25
90 Columbus County, North Carolina
421
0.85
139 Comanche County, Oklahoma
118
0.11
151 Contra Costa County, California
--
--
130 Cook County, Illinois
10,692
0.21
143 Cuyahoga County, Ohio
932
0.07
110 Dakota County, Minnesota
1,331
0.48
151 Dallas County, Iowa
--
--
147 Dallas County, Texas
507
0.03
151 Dane County, Wisconsin
--
--
48 Davison County, South Dakota
448
2.56
103 Delaware County, New York
282
0.6
151 Delaware County, Ohio
--
--
151 Denton County, Texas
--
--
117 Denver County, Colorado
1,898
0.41
151 Deuel County, South Dakota
--
--
151 Dickinson County, Iowa
--
--
112 Dodge County, Wisconsin
349
0.46
113 Douglas County, Minnesota
129
0.45
136 Douglas County, Nebraska
574
0.14
2 Douglas County, South Dakota
845
22.56
139 DuPage County, Illinois
891
0.11
57 Dutchess County, New York
5,185
2
137 El Paso County, Colorado
522
0.13
25 Emmons County, North Dakota
236
4.89
151 Erie County, New York
--
--
151 Escambia County, Alabama
--
--
128 Essex County, New Jersey
1,875
0.24
94 Essex County, New York
271
0.73
61 Fillmore County, Minnesota
374
1.8
32 Fond du Lac County, Wisconsin
3,813
4.23
19 Franklin County, Iowa
681
5.99
98 Franklin County, New York
317
0.68
142 Franklin County, Ohio
781
0.08
151 Frederick County, Maryland
--
--
86 Freeborn County, Minnesota
331
1
151 Fresno County, California
--
--
146 Fulton County, Georgia
249
0.04
100 Fulton County, Illinois
242
0.64
91 Fulton County, New York
439
0.81
84 Gage County, Nebraska
240
1.05
141 Genesee County, Michigan
368
0.09
78 Gooding County, Idaho
147
1.26
71 Grand Traverse County, Michigan
943
1.47
88 Grant County, Minnesota
57
0.91
151 Grant County, South Dakota
--
--
40 Greene County, New York
1,690
3.78
15 Grundy County, Iowa
963
8.01
151 Gwinnett County, Georgia
--
--
130 Hamilton County, Indiana
232
0.21
31 Hamlin County, South Dakota
215
4.32
65 Hardin County, Iowa
309
1.62
76 Henderson County, Illinois
106
1.31
146 Hennepin County, Minnesota
435
0.04
72 Herkimer County, New York
961
1.46
147 Hillsborough County, Florida
216
0.03
124 Hudson County, New Jersey
1,658
0.3
56 Hunterdon County, New Jersey
2,168
2.01
135 Ingham County, Michigan
416
0.15
105 Iroquois County, Illinois
170
0.55
80 Island County, Washington
745
1.24
44 Jackson County, Kentucky
367
3.07
148 Jackson County, Missouri
150
0.02
17 Jasper County, Indiana
1,581
6.33
37 Jasper County, Iowa
1,359
3.91
135 Jefferson County, Colorado
679
0.15
121 Jefferson County, New York
375
0.34
151 Johnson County, Iowa
--
--
139 Johnson County, Kansas
384
0.11
151 Jones County, South Dakota
--
--
35 Kalamazoo County, Michigan
8,977
4.02
59 Kandiyohi County, Minnesota
712
1.84
89 Kankakee County, Illinois
834
0.87
33 Kent County, Michigan
20,738
4.14
146 King County, Washington
658
0.04
143 Kings County, New York
1,550
0.07
63 Kossuth County, Iowa
319
1.72
105 Lac qui Parle County, Minnesota
49
0.55
147 Lake County, Illinois
147
0.03
131 Lake County, Indiana
953
0.2
68 Lake County, Minnesota
160
1.54
54 LaMoure County, North Dakota
113
2.1
114 Lancaster County, Nebraska
939
0.44
147 Lee County, Florida
93
0.03
55 Leelanau County, Michigan
334
2.02
125 Lewis County, New York
79
0.29
23 Lincoln County, South Dakota
799
5.18
132 Linn County, Iowa
325
0.19
151 Los Alamos County, New Mexico
--
--
141 Los Angeles County, California
7,936
0.09
3 Lyon County, Iowa
2,146
17.96
147 Macomb County, Michigan
210
0.03
151 Madera County, California
--
--
27 Mahaska County, Iowa
989
4.6
123 Manatee County, Florida
676
0.32
115 Marathon County, Wisconsin
500
0.43
140 Maricopa County, Arizona
2,066
0.1
147 Marion County, Indiana
220
0.03
7 Marion County, Iowa
4,080
13.6
77 Marshall County, South Dakota
63
1.3
82 Mason County, Michigan
285
1.12
123 Medina County, Ohio
397
0.32
142 Mercer County, New Jersey
270
0.08
149 Miami-Dade County, Florida
117
0.01
149 Middlesex County, Massachusetts
166
0.01
106 Middlesex County, New Jersey
3,573
0.53
113 Midland County, Michigan
338
0.45
140 Milwaukee County, Wisconsin
973
0.1
62 Minnehaha County, South Dakota
2,173
1.76
20 Missaukee County, Michigan
708
5.83
147 Mobile County, Alabama
95
0.03
99 Monmouth County, New Jersey
3,602
0.65
133 Monroe County, New York
1,259
0.18
151 Monroe County, Pennsylvania
--
--
28 Montgomery County, New York
2,371
4.56
142 Montgomery County, Pennsylvania
562
0.08
108 Morris County, New Jersey
2,113
0.5
150 Multnomah County, Oregon
29
0
24 Murray County, Minnesota
473
4.9
41 Muskegon County, Michigan
5,715
3.59
128 Nassau County, New York
3,122
0.24
92 New York County, New York
11,447
0.77
38 Newaygo County, Michigan
1,488
3.9
22 Nobles County, Minnesota
1,075
5.35
151 Northampton County, Pennsylvania
--
--
148 Oakland County, Michigan
244
0.02
4 O'Brien County, Iowa
2,628
17.02
118 Ocean County, New Jersey
1,699
0.39
70 Oceana County, Michigan
334
1.49
52 Ogle County, Illinois
997
2.17
132 Oklahoma County, Oklahoma
1,114
0.19
127 Olmsted County, Minnesota
271
0.25
139 Oneida County, New York
276
0.11
136 Onondaga County, New York
646
0.14
97 Orange County, California
16,850
0.7
140 Orange County, Florida
695
0.1
88 Orange County, New York
2,795
0.91
10 Osceola County, Iowa
775
10.66
106 Otero County, New Mexico
276
0.53
6 Ottawa County, Michigan
26,514
14.12
148 Palm Beach County, Florida
213
0.02
123 Pasco County, Florida
888
0.32
87 Passaic County, New Jersey
4,475
0.99
145 Peoria County, Illinois
83
0.05
151 Philadelphia County, Pennsylvania
--
--
42 Phillips County, Kansas
228
3.46
111 Pike County, Pennsylvania
132
0.47
144 Pima County, Arizona
385
0.06
145 Pinellas County, Florida
398
0.05
13 Pipestone County, Minnesota
871
8.3
144 Placer County, California
100
0.06
151 Plymouth County, Iowa
--
--
97 Polk County, Iowa
2,298
0.7
126 Queens County, New York
4,989
0.26
138 Racine County, Wisconsin
215
0.12
151 Ramsey County, Minnesota
--
--
60 Rensselaer County, New York
2,833
1.83
125 Richmond County, New York
1,091
0.29
89 Rio Arriba County, New Mexico
299
0.87
118 Riverside County, California
4,581
0.39
8 Rock County, Minnesota
1,166
11.89
130 Rock County, Wisconsin
286
0.21
106 Rockland County, New York
1,395
0.53
129 Sacramento County, California
2,252
0.22
140 San Bernardino County, California
1,446
0.1
148 San Diego County, California
596
0.02
147 San Francisco County, California
225
0.03
127 San Joaquin County, California
1,188
0.25
148 San Mateo County, California
161
0.02
146 Santa Barbara County, California
165
0.04
147 Santa Clara County, California
422
0.03
139 Sarasota County, Florida
310
0.11
101 Saratoga County, New York
1,116
0.62
34 Schenectady County, New York
6,066
4.06
45 Schoharie County, New York
923
2.9
132 Scott County, Iowa
294
0.19
107 Scott County, Minnesota
296
0.51
151 Sedgwick County, Kansas
--
--
66 Seneca County, New York
541
1.61
29 Sheboygan County, Wisconsin
4,681
4.51
1 Sioux County, Iowa
10,755
35.97
142 Snohomish County, Washington
384
0.08
46 Somerset County, New Jersey
6,585
2.74
148 Sonoma County, California
80
0.02
151 St. Charles County, Missouri
--
--
83 St. Croix County, Wisconsin
555
1.1
141 Stanislaus County, California
316
0.09
76 Stephenson County, Illinois
628
1.31
137 Suffolk County, New York
1,752
0.13
74 Sullivan County, New York
955
1.38
138 Sussex County, New Jersey
156
0.12
151 Tarrant County, Texas
--
--
114 Tazewell County, Illinois
543
0.44
26 Thurston County, Nebraska
335
4.83
122 Tippecanoe County, Indiana
432
0.33
138 Tulare County, California
385
0.12
11 Turner County, South Dakota
814
9.49
75 Twin Falls County, Idaho
730
1.36
28 Ulster County, New York
7,531
4.56
140 Union County, New Jersey
470
0.1
67 Van Buren County, Michigan
1,090
1.56
151 Van Wert County, Ohio
--
--
145 Wake County, North Carolina
205
0.05
123 Walworth County, Wisconsin
240
0.32
134 Wapello County, Iowa
62
0.17
151 Warren County, Iowa
--
--
119 Washington County, New York
224
0.38
142 Washington County, Wisconsin
74
0.08
146 Washtenaw County, Michigan
105
0.04
142 Waukesha County, Wisconsin
242
0.08
142 Wayne County, Michigan
1,631
0.08
50 Wayne County, New York
2,023
2.27
151 Wayne County, Pennsylvania
--
--
116 Westchester County, New York
3,667
0.42
81 Whatcom County, Washington
1,551
1.21
18 Whiteside County, Illinois
3,709
6.16
129 Will County, Illinois
780
0.22
151 Williamson County, Tennessee
--
--
139 Winnebago County, Illinois
277
0.11
43 Winnebago County, Iowa
412
3.4
107 Wood County, Wisconsin
379
0.51
96 Woodbury County, Iowa
696
0.71
51 Wright County, Iowa
318
2.23
151 Wright County, Minnesota
--
--
134 Yakima County, Washington
325
0.17
58 Yankton County, South Dakota
377
1.96
131 Yavapai County, Arizona
215
0.2


* In an effort to better match the ASARB standards for adherents, a few religious bodies changed the way their adherents were reported in 2010, including Amish groups, Friends groups, Jewish groups, the Church of Jesus Christ of Latter-day Saints, Non-denominational Christian Churches, and the United Methodist Church. This change does not affect any of the data in the newly released 2010 U.S. Religion Census: Religious Congregations & Membership Study. In fact, the data for these groups are now more comparable to that of other bodies than it was in previous decadal reports.

However, the change in methodology can distort assessments on growth or decline between 2000 and 2010 for each of these groups. County-level 2000 data using the new methodology are not readily available. ASARB staff has adjusted some 2000 county-level adherent statistics to allow for a more accurate picture on growth or decline. The revised maps and charts are now available on-line at www.usreligioncensus.org for those who are interested in these trends.

Source

2010 data were collected by the Association of Statisticians of American Religious Bodies (ASARB) and include statistics for 236 religious groups, providing information on the number of their congregations and adherents within each state and county in the United States. Clifford Grammich, Kirk Hadaway, Richard Houseal, Dale E. Jones, Alexei Krindatch, Richie Stanley and Richard H. Taylor supervised the collection. These data originally appeared in 2010 U.S. Religion Census: Religious Congregations & Membership Study, published by the Association of Statisticians of American Religious Bodies (ASARB). [More information on the data collection]