Reformed Church in America Counties (1980) [ 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
144 Ada County, Idaho
--
--
144 Adams County, Colorado
--
--
142 Alameda County, California
138
0.01
48 Albany County, New York
8,021
2.81
30 Allegan County, Michigan
3,817
4.68
144 Allen County, Indiana
--
--
71 Antrim County, Michigan
251
1.55
130 Arapahoe County, Colorado
389
0.13
11 Aurora County, South Dakota
321
8.85
106 Barnes County, North Dakota
67
0.48
64 Barry County, Michigan
786
1.72
57 Bergen County, New Jersey
17,221
2.04
126 Berrien County, Michigan
294
0.17
100 Black Hawk County, Iowa
818
0.59
15 Bon Homme County, South Dakota
610
7.57
143 Bronx County, New York
0
0
82 Brookings County, South Dakota
280
1.15
139 Broward County, Florida
429
0.04
94 Bucks County, Pennsylvania
3,751
0.78
99 Burleigh County, North Dakota
327
0.6
137 Burlington County, New Jersey
235
0.06
8 Butler County, Iowa
1,901
10.76
92 Caddo County, Oklahoma
247
0.8
129 Calhoun County, Michigan
196
0.14
98 Carroll County, Illinois
119
0.63
119 Cascade County, Montana
217
0.27
143 Cass County, North Dakota
0
0
114 Cayuga County, New York
259
0.32
86 Cerro Gordo County, Iowa
482
0.99
45 Charles Mix County, South Dakota
310
3.2
73 Charlevoix County, Michigan
282
1.42
107 Chautauqua County, New York
685
0.47
13 Chippewa County, Minnesota
1,219
8.16
47 Clark County, South Dakota
141
2.88
43 Clay County, Iowa
639
3.26
104 Clinton County, Iowa
288
0.5
143 Clinton County, Michigan
0
0
143 Collin County, Texas
0
0
14 Columbia County, New York
4,629
7.78
52 Columbia County, Wisconsin
961
2.22
143 Columbus County, North Carolina
0
0
128 Comanche County, Oklahoma
171
0.15
144 Contra Costa County, California
--
--
123 Cook County, Illinois
11,600
0.22
133 Cuyahoga County, Ohio
1,549
0.1
143 Dakota County, Minnesota
0
0
144 Dallas County, Iowa
--
--
143 Dallas County, Texas
0
0
138 Dane County, Wisconsin
173
0.05
65 Davison County, South Dakota
301
1.69
96 Delaware County, New York
326
0.7
144 Delaware County, Ohio
--
--
144 Denton County, Texas
--
--
109 Denver County, Colorado
2,189
0.44
77 Deuel County, South Dakota
67
1.27
144 Dickinson County, Iowa
--
--
39 Dodge County, Wisconsin
2,821
3.76
121 Douglas County, Minnesota
68
0.24
131 Douglas County, Nebraska
485
0.12
3 Douglas County, South Dakota
765
18.3
133 DuPage County, Illinois
643
0.1
53 Dutchess County, New York
5,339
2.18
143 El Paso County, Colorado
0
0
21 Emmons County, North Dakota
373
6.35
142 Erie County, New York
66
0.01
118 Escambia County, Alabama
107
0.28
115 Essex County, New Jersey
2,637
0.31
143 Essex County, New York
0
0
55 Fillmore County, Minnesota
451
2.06
81 Fond du Lac County, Wisconsin
1,037
1.17
33 Franklin County, Iowa
564
4.33
143 Franklin County, New York
0
0
138 Franklin County, Ohio
449
0.05
144 Frederick County, Maryland
--
--
79 Freeborn County, Minnesota
442
1.22
144 Fresno County, California
--
--
143 Fulton County, Georgia
0
0
99 Fulton County, Illinois
263
0.6
87 Fulton County, New York
540
0.98
85 Gage County, Nebraska
247
1.01
133 Genesee County, Michigan
447
0.1
143 Gooding County, Idaho
0
0
88 Grand Traverse County, Michigan
500
0.91
69 Grant County, Minnesota
117
1.63
144 Grant County, South Dakota
--
--
32 Greene County, New York
1,836
4.49
16 Grundy County, Iowa
1,030
7.17
144 Gwinnett County, Georgia
--
--
143 Hamilton County, Indiana
0
0
34 Hamlin County, South Dakota
213
4.05
62 Hardin County, Iowa
383
1.76
76 Henderson County, Illinois
122
1.34
139 Hennepin County, Minnesota
393
0.04
63 Herkimer County, New York
1,159
1.74
137 Hillsborough County, Florida
378
0.06
101 Hudson County, New Jersey
3,111
0.56
44 Hunterdon County, New Jersey
2,816
3.22
116 Ingham County, Michigan
814
0.3
94 Iroquois County, Illinois
256
0.78
70 Island County, Washington
699
1.59
42 Jackson County, Kentucky
436
3.63
143 Jackson County, Missouri
0
0
23 Jasper County, Indiana
1,552
5.94
35 Jasper County, Iowa
1,421
3.9
143 Jefferson County, Colorado
0
0
114 Jefferson County, New York
279
0.32
144 Johnson County, Iowa
--
--
143 Johnson County, Kansas
0
0
35 Jones County, South Dakota
57
3.9
38 Kalamazoo County, Michigan
8,039
3.79
60 Kandiyohi County, Minnesota
673
1.83
90 Kankakee County, Illinois
876
0.85
28 Kent County, Michigan
21,761
4.9
138 King County, Washington
620
0.05
143 Kings County, New York
0
0
56 Kossuth County, Iowa
449
2.05
143 Lac qui Parle County, Minnesota
0
0
143 Lake County, Illinois
0
0
124 Lake County, Indiana
1,120
0.21
143 Lake County, Minnesota
0
0
58 LaMoure County, North Dakota
120
1.85
105 Lancaster County, Nebraska
940
0.49
143 Lee County, Florida
0
0
61 Leelanau County, Michigan
254
1.81
120 Lewis County, New York
65
0.26
25 Lincoln County, South Dakota
775
5.56
126 Linn County, Iowa
296
0.17
144 Los Alamos County, New Mexico
--
--
133 Los Angeles County, California
7,703
0.1
4 Lyon County, Iowa
2,206
17.11
138 Macomb County, Michigan
318
0.05
144 Madera County, California
--
--
29 Mahaska County, Iowa
1,085
4.74
98 Manatee County, Florida
932
0.63
111 Marathon County, Wisconsin
416
0.37
129 Maricopa County, Arizona
2,104
0.14
139 Marion County, Indiana
321
0.04
6 Marion County, Iowa
4,384
14.78
50 Marshall County, South Dakota
139
2.57
91 Mason County, Michigan
213
0.81
124 Medina County, Ohio
234
0.21
143 Mercer County, New Jersey
0
0
144 Miami-Dade County, Florida
--
--
143 Middlesex County, Massachusetts
0
0
95 Middlesex County, New Jersey
4,550
0.76
99 Midland County, Michigan
441
0.6
135 Milwaukee County, Wisconsin
783
0.08
68 Minnehaha County, South Dakota
1,794
1.64
17 Missaukee County, Michigan
681
6.8
143 Mobile County, Alabama
0
0
89 Monmouth County, New Jersey
4,354
0.87
122 Monroe County, New York
1,636
0.23
117 Monroe County, Pennsylvania
200
0.29
20 Montgomery County, New York
3,449
6.45
134 Montgomery County, Pennsylvania
585
0.09
93 Morris County, New Jersey
3,237
0.79
143 Multnomah County, Oregon
0
0
22 Murray County, Minnesota
710
6.17
41 Muskegon County, Michigan
5,744
3.64
112 Nassau County, New York
4,636
0.35
78 New York County, New York
17,995
1.26
36 Newaygo County, Michigan
1,360
3.89
31 Nobles County, Minnesota
1,009
4.62
127 Northampton County, Pennsylvania
350
0.16
141 Oakland County, Michigan
175
0.02
5 O'Brien County, Iowa
2,643
15.57
127 Ocean County, New Jersey
551
0.16
54 Oceana County, Michigan
468
2.13
51 Ogle County, Illinois
1,046
2.26
131 Oklahoma County, Oklahoma
674
0.12
114 Olmsted County, Minnesota
294
0.32
129 Oneida County, New York
365
0.14
125 Onondaga County, New York
816
0.18
95 Orange County, California
14,721
0.76
130 Orange County, Florida
599
0.13
80 Orange County, New York
3,088
1.19
9 Osceola County, Iowa
855
10.21
102 Otero County, New Mexico
232
0.52
2 Ottawa County, Michigan
33,382
21.24
139 Palm Beach County, Florida
238
0.04
130 Pasco County, Florida
253
0.13
67 Passaic County, New Jersey
7,410
1.66
138 Peoria County, Illinois
109
0.05
142 Philadelphia County, Pennsylvania
245
0.01
40 Phillips County, Kansas
276
3.73
143 Pike County, Pennsylvania
0
0
135 Pima County, Arizona
436
0.08
134 Pinellas County, Florida
681
0.09
12 Pipestone County, Minnesota
984
8.42
143 Placer County, California
0
0
144 Plymouth County, Iowa
--
--
110 Polk County, Iowa
1,266
0.42
143 Queens County, New York
0
0
132 Racine County, Wisconsin
193
0.11
130 Ramsey County, Minnesota
619
0.13
59 Rensselaer County, New York
2,790
1.84
143 Richmond County, New York
0
0
89 Rio Arriba County, New Mexico
255
0.87
112 Riverside County, California
2,309
0.35
7 Rock County, Minnesota
1,187
11.09
123 Rock County, Wisconsin
305
0.22
97 Rockland County, New York
1,764
0.68
122 Sacramento County, California
1,802
0.23
126 San Bernardino County, California
1,562
0.17
140 San Diego County, California
531
0.03
141 San Francisco County, California
141
0.02
118 San Joaquin County, California
958
0.28
143 San Mateo County, California
0
0
143 Santa Barbara County, California
0
0
140 Santa Clara County, California
328
0.03
122 Sarasota County, Florida
463
0.23
97 Saratoga County, New York
1,052
0.68
26 Schenectady County, New York
8,151
5.44
37 Schoharie County, New York
1,133
3.81
135 Scott County, Iowa
134
0.08
143 Scott County, Minnesota
0
0
144 Sedgwick County, Kansas
--
--
66 Seneca County, New York
565
1.67
27 Sheboygan County, Wisconsin
4,959
4.91
1 Sioux County, Iowa
10,615
34.45
133 Snohomish County, Washington
329
0.1
40 Somerset County, New Jersey
7,577
3.73
139 Sonoma County, California
122
0.04
144 St. Charles County, Missouri
--
--
72 St. Croix County, Wisconsin
621
1.44
136 Stanislaus County, California
190
0.07
75 Stephenson County, Illinois
681
1.37
134 Suffolk County, New York
1,189
0.09
83 Sullivan County, New York
741
1.14
126 Sussex County, New Jersey
200
0.17
144 Tarrant County, Texas
--
--
107 Tazewell County, Illinois
626
0.47
19 Thurston County, Nebraska
473
6.58
108 Tippecanoe County, Indiana
544
0.45
132 Tulare County, California
273
0.11
10 Turner County, South Dakota
885
9.56
107 Twin Falls County, Idaho
249
0.47
24 Ulster County, New York
9,049
5.72
134 Union County, New Jersey
451
0.09
88 Van Buren County, Michigan
608
0.91
144 Van Wert County, Ohio
--
--
143 Wake County, North Carolina
0
0
123 Walworth County, Wisconsin
154
0.22
126 Wapello County, Iowa
70
0.17
144 Warren County, Iowa
--
--
114 Washington County, New York
174
0.32
143 Washington County, Wisconsin
0
0
128 Washtenaw County, Michigan
402
0.15
134 Waukesha County, Wisconsin
249
0.09
132 Wayne County, Michigan
2,671
0.11
49 Wayne County, New York
2,309
2.73
144 Wayne County, Pennsylvania
--
--
96 Westchester County, New York
6,028
0.7
74 Whatcom County, Washington
1,490
1.4
18 Whiteside County, Illinois
4,394
6.66
132 Will County, Illinois
357
0.11
144 Williamson County, Tennessee
--
--
135 Winnebago County, Illinois
196
0.08
46 Winnebago County, Iowa
409
3.14
113 Wood County, Wisconsin
237
0.33
103 Woodbury County, Iowa
516
0.51
49 Wright County, Iowa
445
2.73
111 Wright County, Minnesota
216
0.37
132 Yakima County, Washington
182
0.11
84 Yankton County, South Dakota
204
1.08
143 Yavapai County, Arizona
0
0


* 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]