| Barton | Jackson (part) |
| Bates | Johnson |
| Benton | Laclede |
| Boone (part) | Lafayette |
| Camden (part) | Morgan |
| Cass | Pettis |
| Cedar | Polk |
| Dade | Pulaski |
| Dallas | Saline |
| Henry | St. Clair |
| Hickory | Vernon |
| Howard | Webster (part) |
ZIP Codes in Missouri’s 4th Congressional District
64001, 64011, 64012, 64014, 64015, 64016, 64017, 64019, 64020, 64021, 64022, 64029, 64034, 64037, 64040, 64057, 64061, 64064, 64067, 64070, 64071, 64074, 64075, 64076, 64078, 64080, 64082, 64083, 64086, 64090, 64093, 64096, 64097, 64147, 64701, 64720, 64722, 64723, 64724, 64725, 64726, 64728, 64730, 64733, 64734, 64735, 64738, 64739, 64740, 64741, 64742, 64743, 64744, 64745, 64746, 64747, 64748, 64750, 64752, 64755, 64756, 64759, 64761, 64762, 64763, 64767, 64769, 64770, 64771, 64772, 64776, 64778, 64779, 64780, 64781, 64783, 64784, 64788, 64790, 64832, 64855, 65011, 65020, 65026, 65034, 65037, 65047, 65052, 65065, 65072, 65078, 65079, 65081, 65084, 65201, 65202, 65203, 65215, 65216, 65230, 65240, 65243, 65248, 65250, 65254, 65255, 65256, 65257, 65274, 65279, 65284, 65301, 65305, 65320, 65321, 65322, 65323, 65324, 65325, 65326, 65327, 65329, 65330, 65332, 65333, 65334, 65335, 65336, 65337, 65338, 65339, 65340, 65344, 65345, 65347, 65348, 65349, 65350, 65351, 65354, 65355, 65360, 65452, 65457, 65459, 65461, 65463, 65470, 65473, 65534, 65536, 65543, 65550, 65552, 65556, 65567, 65583, 65584, 65590, 65591, 65601, 65603, 65604, 65613, 65617, 65622, 65632, 65634, 65635, 65640, 65644, 65646, 65648, 65649, 65650, 65661, 65662, 65663, 65667, 65668, 65674, 65682, 65685, 65706, 65710, 65713, 65722, 65724, 65725, 65727, 65732, 65735, 65746, 65752, 65757, 65764, 65767, 65770, 65774, 65779, 65781, 65783, 65785, 65786, 65787