RANKING · Q2 2026

Lowest efficiency ratio in Iowa

194 of 227 banks in Iowa that filed for the quarter ended June 30, 2026 are ranked. At least $100 million in total assets and positive revenue. Institutions with equal values share a rank. Source: FDIC quarterly financial data.

Lowest efficiency ratio in Iowa, Q2 2026
Rank	Institution	Headquarters	Efficiency ratio (noninterest expense / revenue)	Total assets
1	Corydon State Bank	Corydon, IA	26.6%	$138 million
2	Security State Bank	Sutherland, IA	27.7%	$492 million
3	New Albin Savings Bank	New Albin, IA	33.3%	$351 million
4	Bellevue State Bank	Bellevue, IA	34.0%	$188 million
5	Pocahontas State Bank	Pocahontas, IA	35.4%	$123 million
6	Farmers Trust and Savings Bank	Williamsburg, IA	36.6%	$192 million
7	First State Bank	Britt, IA	37.4%	$126 million
8	Principal Bank	Des Moines, IA	37.7%	$9.8 billion
9	Glenwood State Bank	Glenwood, IA	37.8%	$353 million
10	United Bank and Trust Company	Hampton, IA	37.8%	$228 million
11	Cedar Rapids Bank and Trust Company	Cedar Rapids, IA	39.1%	$2.9 billion
12	Audubon State Bank	Audubon, IA	39.2%	$155 million
13	Solon State Bank	Solon, IA	39.6%	$122 million
14	First Whitney Bank and Trust	Atlantic, IA	39.6%	$288 million
15	Atkins Savings Bank & Trust	Atkins, IA	39.7%	$172 million
16	Security State Bank	Algona, IA	40.6%	$110 million
17	Farmers State Bank	Marion, IA	41.9%	$1.1 billion
18	Commercial Savings Bank	Carroll, IA	41.9%	$349 million
19	Pinnacle Bank	Marshalltown, IA	42.0%	$324 million
20	Iowa State Bank	Hull, IA	42.3%	$1.3 billion
21	Pilot Grove Savings Bank	Pilot Grove, IA	42.3%	$1.2 billion
22	Primebank	Le Mars, IA	42.6%	$801 million
23	Premier Bank	Rock Valley, IA	42.7%	$826 million
24	White State Bank	South English, IA	42.8%	$109 million
25	The Readlyn Savings Bank	Readlyn, IA	43.1%	$148 million
26	Hills Bank and Trust Company	Hills, IA	43.2%	$4.8 billion
27	First State Bank	Lynnville, IA	43.4%	$384 million
28	Exchange State Bank	Ames, IA	43.8%	$146 million
29	American State Bank	Sioux Center, IA	44.3%	$1.4 billion
30	Iowa State Bank	Clarksville, IA	44.3%	$393 million
31	First Iowa State Bank	Albia, IA	44.4%	$396 million
32	First Citizens Bank	Mason City, IA	44.6%	$1.8 billion
33	Blue Grass Savings Bank	Blue Grass, IA	44.6%	$225 million
34	State Savings Bank	Bedford, IA	45.7%	$207 million
35	The Home Trust & Savings Bank	Osage, IA	45.9%	$288 million
36	West Bank	West Des Moines, IA	46.0%	$4.0 billion
37	Breda Savings Bank	Breda, IA	46.0%	$106 million
38	Citizens State Bank	Sheldon, IA	46.3%	$195 million
39	Washington State Bank	Washington, IA	46.4%	$601 million
40	Waukon State Bank	Waukon, IA	46.5%	$427 million
41	Templeton Savings Bank	Templeton, IA	46.6%	$170 million
42	American Bank N.A.	Le Mars, IA	46.8%	$533 million
43	First Bank Hampton	Hampton, IA	46.9%	$241 million
44	Peoples Bank	Rock Valley, IA	47.0%	$1.3 billion
45	First Bank	Waverly, IA	47.3%	$740 million
46	Luana Savings Bank	Luana, IA	47.6%	$2.3 billion
47	Chelsea Savings Bank	Belle Plaine, IA	47.8%	$197 million
48	Farmers & Merchants Savings Bank	Manchester, IA	47.9%	$617 million
49	Crawford County Trust and Savings Bank	Denison, IA	48.0%	$294 million
50	Marion County State Bank	Pella, IA	48.2%	$629 million
51	State Bank & Trust Co.	Nevada, IA	48.6%	$198 million
52	Savings Bank	Primghar, IA	48.9%	$305 million
53	American State Bank	Osceola, IA	49.0%	$361 million
54	Rolling Hills Bank & Trust	Atlantic, IA	49.2%	$484 million
55	Liberty Trust & Savings Bank	Durant, IA	49.3%	$186 million
56	Security Savings Bank	Gowrie, IA	49.7%	$194 million
57	Charter Bank	Johnston, IA	49.9%	$228 million
58	Houghton State Bank	Red Oak, IA	49.9%	$205 million
59	Mount Vernon Bank and Trust Company	Mount Vernon, IA	50.0%	$195 million
60	Central State Bank	Coralville, IA	50.0%	$419 million
61	Farmers State Bank	Waterloo, IA	50.1%	$1.6 billion
62	Freedom Financial Bank	West Des Moines, IA	50.2%	$269 million
63	Farmers Trust & Savings Bank	Earling, IA	50.2%	$148 million
64	Pioneer Bank	Sergeant Bluff, IA	50.5%	$283 million
65	Iowa State Bank and Trust Company	Fairfield, IA	50.6%	$352 million
66	Capra Bank	Dubuque, IA	50.9%	$1.3 billion
67	Community State Bank	Spencer, IA	51.0%	$346 million
68	Sibley State Bank	Sibley, IA	51.3%	$104 million
69	Northstar Bank	Estherville, IA	51.4%	$203 million
70	Hardin County Savings Bank	Eldora, IA	52.3%	$402 million
71	Green Belt Bank & Trust	Iowa Falls, IA	52.4%	$759 million
72	The Security National Bank of Sioux City, Iowa	Sioux City, IA	52.4%	$1.7 billion
73	Clear Lake Bank and Trust Company	Clear Lake, IA	52.6%	$649 million
74	Northeast Security Bank	Sumner, IA	52.6%	$462 million
75	Citizens State Bank	Wyoming, IA	52.6%	$138 million
76	Farmers Trust and Savings Bank	Spencer, IA	52.8%	$618 million
77	Quad City Bank and Trust Company	Bettendorf, IA	52.8%	$2.8 billion
78	First Central State Bank	Dewitt, IA	52.9%	$772 million
79	Fidelity Bank & Trust	Dubuque, IA	53.0%	$2.6 billion
80	Fnb Bank	Fontanelle, IA	53.1%	$275 million
81	State Savings Bank	West Des Moines, IA	53.3%	$292 million
82	Security Trust & Savings Bank	Storm Lake, IA	53.4%	$266 million
83	Union State Bank	Greenfield, IA	53.6%	$169 million
84	Maynard Savings Bank	Maynard, IA	53.7%	$108 million
85	Community Bank	Dunlap, IA	53.9%	$138 million
86	Farmers & Merchants State Bank	Winterset, IA	53.9%	$272 million
87	Cusb Bank	Cresco, IA	53.9%	$812 million
88	First National Bank Ames, Iowa	Ames, IA	53.9%	$1.1 billion
89	Heartland Bank	Somers, IA	53.9%	$256 million
90	Decorah Bank and Trust Company	Decorah, IA	54.1%	$794 million
91	Iowa Trust and Savings Bank	Centerville, IA	54.3%	$211 million
92	Ohnward Bank & Trust	Cascade, IA	54.5%	$499 million
93	Connection Bank	Fort Madison, IA	54.7%	$541 million
94	Iowa State Savings Bank	Creston, IA	54.9%	$277 million
95	West Iowa Bank	West Bend, IA	55.0%	$222 million
96	Shelby County State Bank	Harlan, IA	55.0%	$524 million
97	Leighton State Bank	Pella, IA	55.1%	$298 million
98	Mediapolis Savings Bank	Mediapolis, IA	55.2%	$270 million
99	Citizens First National Bank	Storm Lake, IA	55.3%	$256 million
100	Raccoon Valley Bank	Perry, IA	55.6%	$486 million

Rankings sort one published measure; they are not an overall judgment of any institution. Methodology · All rankings