Lakes / Iowa / Largest Lakes in Iowa

Largest Lakes in Iowa

Ranked by surface area, from USGS National Hydrography Dataset lake data. Flowages and reservoirs count here - size is size - and each is labeled in its own record.

#	Lake	County	Surface Area	Max Depth
1	Rathbun Lake	Appanoose	13,869 acres	-
2	Lake Red Rock	Marion	8,619 acres	-
3	Spirit Lake	Dickinson	5,463 acres	-
4	Saylorville Lake	Polk	5,428 acres	-
5	Clear Lake	Cerro Gordo	3,632 acres	-
6	Storm Lake	Buena Vista	3,108 acres	-
7	Lake Odesa	Louisa	1,744 acres	-
8	Lake Panorama	Guthrie	1,179 acres	-
9	Lost Island Lake	Palo Alto	1,152 acres	-
10	Trumbull Lake	Clay	1,061 acres	-
11	Silver Lake	Dickinson	1,024 acres	-
12	Town Lake	Jackson	956 acres	-
13	Black Hawk Lake	Sac	914 acres	-
14	Rice Lake	Worth	891 acres	-
15	Lake MacBride	Johnson	866 acres	-
16	Big Creek Lake	Polk	856 acres	-
17	Three Mile Lake	Union	836 acres	-
18	Swan Lake	Emmet	766 acres	-
19	Lake Icaria	Adams	749 acres	-
20	Lake Manawa	Pottawattamie	733 acres	-
21	Big Lake	Allamakee	704 acres	-
22	Twelve Mile Lake	Union	644 acres	-
23	Silver Lake	Palo Alto	642 acres	-
24	High Lake	Emmet	555 acres	-
25	Cedar Lake	Chickasaw	542 acres	-
26	Rock Creek Lake	Jasper	515 acres	-
27	Hartwick Lake	Delaware	506 acres	-
28	South Twin Lake	Calhoun	465 acres	-
29	Rush Lake	Palo Alto	457 acres	-
30	North Twin Lake	Calhoun	452 acres	-
31	Upper Brown Lake	Jackson	443 acres	-
32	Eagle Lake	Hancock	434 acres	-
33	Forneys Lake	Fremont	398 acres	-
34	Sun Valley Lake	Ringgold	398 acres	-
35	Big Wall Lake	Wright	384 acres	-
36	Mud Hen Lake	Allamakee	383 acres	-
37	Ingham Lake	Emmet	368 acres	-
38	Smith Pool	Kossuth	345 acres	-
39	Elm Lake	Wright	336 acres	-
40	Green Valley Lake	Union	330 acres	-
41	Blue Lake	Monona	320 acres	-
42	Silver Lake	Worth	314 acres	-
43	West Lake	Clarke	287 acres	-
44	Wood Duck Slough	Clayton	286 acres	-
45	Mud Lake	Clay	283 acres	-
46	Dan Green Slough	Clay	278 acres	-
47	Rush Lake	Osceola	276 acres	-
48	Lizard Lake	Pocahontas	274 acres	-
49	Lake Wapello	Davis	266 acres	-
50	Crystal Lake	Hancock	260 acres	-
51	Sabula Lakes	Jackson	260 acres	-
52	Center Lake	Dickinson	258 acres	-
53	Elk Lake	Clay	256 acres	-
54	Grovers Lake	Dickinson	255 acres	-
55	Browns Lake	Woodbury	248 acres	-
56	Little Wall Lake	Hamilton	245 acres	-
57	Lake Darling	Washington	243 acres	-
58	Cunningham Slough	Emmet	242 acres	-
59	Lake Cornelia	Wright	239 acres	-
60	West Hottes Lake	Dickinson	226 acres	-
61	East Twin Lake	Hancock	222 acres	-
62	Virgin Lake	Palo Alto	208 acres	-
63	Twelvemile Lake	Emmet	199 acres	-
64	Bays Branch Lake	Guthrie	192 acres	-
65	Geode Lake	Henry	192 acres	-
66	Eagle Lake	Emmet	191 acres	-
67	Dale Maffit Reservoir	Dallas	187 acres	-
68	Wiese Slough	Muscatine	186 acres	-
69	Prairie Rose Lake	Shelby	182 acres	-
70	Lake Easter	Polk	177 acres	-
71	Swan Lake	Dickinson	170 acres	-
72	Lake Ponderosa	Poweshiek	168 acres	-
73	Lily Pond	Iowa	166 acres	-
74	Marble Lake	Dickinson	166 acres	-
75	Pickerel Lake	Buena Vista	165 acres	-
76	Clear Lake	Pocahontas	163 acres	-
77	Lake Anita	Cass	154 acres	-
78	Lake Colechester	Warren	153 acres	-
79	Viking Lake	Montgomery	144 acres	-
80	Don Williams Lake	Boone	142 acres	-
81	Sunken Island Lake	Pocahontas	135 acres	-
82	Swan Lake	Carroll	131 acres	-
83	Volga Lake	Fayette	130 acres	-
84	Diamond Lake	Dickinson	129 acres	-
85	Lake Morris	Lucas	129 acres	-
86	Folsom Lake	Mills	127 acres	-
87	Goose Lake	Clinton	122 acres	-
88	Iowa Slough Lake	Des Moines	121 acres	-
89	Lake Miami	Monroe	121 acres	-
90	Cedar Lake	Linn	114 acres	-
91	Flat Lake	Jackson	114 acres	-
92	Cheever Lake	Emmet	113 acres	-
93	Duck Lake	Allamakee	113 acres	-
94	Lake Ahquabi	Warren	112 acres	-
95	Lake Ponderosa	Poweshiek	111 acres	-
96	Upper City Reservoir	Appanoose	110 acres	-
97	Morse Lake	Wright	106 acres	-
98	Union Grove Lake	Tama	106 acres	-
99	Quaker Mill Pond	Delaware	105 acres	-
100	Summit Lake	Union	105 acres	-

Showing the top 100 of 220 counted lakes. Search above, or browse by county on the Iowa page, for the full inventory.

Source: USGS National Hydrography Dataset lake data. Verified October 30, 2026. New lakes are added as their records are verified - rankings update with every addition.