| Business | Phone |
| Community Of Christ 1222 11th St, Onawa 51040 | (712) 423-2353 |
| Congregational Church 903 Diamond St, Onawa 51040 | (712) 423-2042 |
| Faith Lutheran Church 316 15th St, Onawa 51040 | (712) 423-1846 |
| First Christian Church 722 15th St, Onawa 51040 | (712) 423-2466 |
| Jehovah's Witnesses 1006 Lucas St, Onawa 51040 | (712) 423-1107 |
| Monona Baptist Tabernacle 1025 8th St, Onawa 51040 | (712) 423-9852 |
| Onawa Evangelical Free Church 1123 12th St, Onawa 51040 | (712) 433-2395 |
| St Joseph Catholic Church 1009 13th St, Onawa 51040 | (712) 423-1004 |
| United Methodist Church 1103 13th St, Onawa 51040 | (712) 423-5115 |
| United Methodist Church 219 Wolfe St, Onawa 51040 | (712) 353-6670 |
| United Pentecostal Church 406 Iowa Ave, Onawa 51040 | (712) 423-3324 |