B
- Badger Township, Webster County
- Baker Township, Guthrie County
- Baker Township, O'Brien County
- Baker Township, Osceola County
- Baltimore Township, Henry County
- Bangor Township, Marshall County
- Banks Township, Fayette County
- Banner Township, Woodbury County
- Barclay Township, Black Hawk County
- Barnes Township, Buena Vista County
- Barton Township, Worth County
- Bath Township, Cerro Gordo County
- Battle Township, Ida County
- Bear Creek Township, Poweshiek County
- Bear Grove Township, Cass County
- Bear Grove Township, Guthrie County
- Beaver Township, Boone County
- Beaver Township, Butler County
- Beaver Township, Dallas County
- Beaver Township, Grundy County
- Beaver Township, Guthrie County
- Beaver Township, Humboldt County
- Beaver Township, Polk County
- Bedford Township, Taylor County
- Belknap Township, Pottawattamie County
- Bellair Township, Appanoose County
- Bellevue Township, Jackson County
- Bellville Township, Pocahontas County
- Belmond Township, Wright County
- Belmont Township, Warren County
- Belvidere Township, Monona County
- Bennezette Township, Butler County
- Bennington Township, Black Hawk County
- Benton Township, Benton County
- Benton Township, Cass County
- Benton Township, Des Moines County
- Benton Township, Fremont County
- Benton Township, Keokuk County
- Benton Township, Lucas County
- Benton Township, Ringgold County
- Benton Township, Taylor County
- Benton Township, Wayne County
- Bertram Township, Linn County
- Bethel Township, Fayette County
- Big Creek Township, Black Hawk County
- Big Grove Township, Benton County
- Big Grove Township, Johnson County
- Bingham Township, Hancock County
- Black Hawk Township, Black Hawk County
- Black Hawk Township, Grundy County
- Black Hawk Township, Jefferson County
- Black Oak Township, Mahaska County
- Blaine Township, Ida County
- Blaine Township, Wright County
- Blairsburg Township, Hamilton County
- Bloomfield Township, Clinton County
- Bloomfield Township, Polk County
- Bloomfield Township, Winneshiek County
- Bloomington Township, Decatur County
- Bloomington Township, Muscatine County
- Blue Grass Township, Scott County
- Bluff Creek Township, Monroe County
- Bluffton Township, Winneshiek County
- Boardman Township, Clayton County
- Bonaparte Township, Van Buren County
- Boomer Township, Pottawattamie County
- Boone Township, Dallas County
- Boone Township, Hancock County
- Boone Township, Wright County
- Booth Township, Palo Alto County
- Boulder Township, Linn County
- Boyer Township, Crawford County
- Boyer Township, Harrison County
- Boyer Valley Township, Sac County
- Bradford Township, Chickasaw County
- Brandon Township, Jackson County
- Bremen Township, Delaware County
- Brighton Township, Cass County
- Brighton Township, Washington County
- Bristol Township, Greene County
- Bristol Township, Worth County
- Britt Township, Hancock County
- Brooke Township, Buena Vista County
- Brookfield Township, Clinton County
- Brookfield Township, Worth County
- Brown Township, Linn County
- Bruce Township, Benton County
- Buchanan Township, Jefferson County
- Buchanan Township, Page County
- Buckeye Township, Hardin County
- Buckingham Township, Tama County
- Buena Vista Township, Clayton County
- Buena Vista Township, Jasper County
- Buffalo Township, Buchanan County
- Buffalo Township, Kossuth County
- Buffalo Township, Linn County
- Buffalo Township, Scott County
- Buffalo Township, Winnebago County
- Buncombe Township, Sioux County
- Burlington Township, Des Moines County
- Burnside Township, Webster County
- Burr Oak Township, Mitchell County
- Burr Oak Township, Winneshiek County
- Burrell Township, Decatur County
- Burt Township, Kossuth County
- Butler Township, Butler County
- Butler Township, Calhoun County
- Butler Township, Jackson County
- Butler Township, Scott County
- Byron Township, Buchanan County
Read more about this topic: List Of Iowa Townships