Table 42 Live Births to Mothers Under Age 20, Ranked by County 2009 (Rate per 1,000 Females)
Rank	County	Number	Rate			Rank	County	Number	Rate
1	Polk	541	80.9					50	Franklin	14	104.5
2	Scott	269	115.0					50	Greene	14	147.4
3	Linn	226	77.9					53	Buchanan	13	42.5
4	Woodbury	207	129.4					53	Decatur	13	126.2
5	Black Hawk	157	89.9					53	Delaware	13	62.8
6	Pottawattamie	150	115.1					53	Emmet	13	103.2
7	Dubuque	106	87.1					53	Fremont	13	136.8
8	Marshall	78	132.4					53	Poweshiek	13	68.1
9	Wapello	68	134.9					59	Harrison	12	69.4
10	Muscatine	66	110.7					59	Iowa	12	58.8
11	Clinton	65	110.4					59	Montgomery	12	102.6
12	Des Moines	62	119.7					62	Calhoun	11	85.9
13	Lee	59	134.4					62	Davis	11	77.5
14	Webster	57	126.9					62	Dickinson	11	68.3
15	Johnson	56	32.7					62	Grundy	11	70.5
16	Cerro Gordo	46	96.4					62	Jones	11	55.0
17	Story	44	44.4					62	Kossuth	11	70.5
18	Buena Vista	39	136.4					68	Butler	10	59.9
19	Dallas	37	36.5					68	Cedar	10	44.6
20	Jasper	33	84.8					68	Cherokee	10	79.4
21	Warren	30	55.9					68	Clayton	10	51.5
22	Marion	29	69.0					68	Hancock	10	95.2
23	Boone	28	91.5					68	Howard	10	74.6
24	Mahaska	27	89.7					68	Monroe	10	128.2
24	Page	27	135.0					68	O'Brien	10	59.2
24	Tama	27	131.7					68	Winneshiek	10	51.3
27	Washington	24	98.8					77	Guthrie	9	72.6
27	Wright	24	150.0					77	Ida	9	84.9
29	Crawford	23	97.9					77	Lucas	9	94.7
29	Sioux	23	44.1					77	Madison	9	45.0
31	Clay	22	114.6					77	Shelby	9	75.0
31	Hamilton	22	118.9					77	Van Buren	9	94.7
33	Allamakee	21	116.7					77	Winnebago	9	88.2
33	Fayette	21	79.8					84	Adams	8	145.5
33	Union	21	152.2					84	Chickasaw	8	58.4
36	Cass	20	123.5					86	Keokuk	7	59.3
37	Appanoose	19	130.1					86	Lyon	7	44.9
37	Carroll	19	69.3					86	Pocahontas	7	101.4
37	Louisa	19	166.7					89	Adair	6	78.9
37	Mills	19	112.4					89	Taylor	6	125.0
37	Plymouth	19	61.3					91	Audubon	5	78.1
42	Henry	18	82.9					91	Monona	5	61.0
42	Jackson	18	82.2					91	Palo Alto	5	54.3
44	Benton	17	58.6					91	Ringgold	5	78.1
44	Clarke	17	124.1					91	Worth	5	60.2
44	Hardin	17	98.3					96	Mitchell	4	35.7
47	Jefferson	16	106.7					96	Osceola	4	60.6
48	Bremer	15	60.0					96	Sac	4	37.7
48	Humboldt	15	135.1					96	Wayne	4	49.4
50	Floyd	14	82.4