Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Monroe Avenue Elementary School | School | 212 | Peoria | 40 43 58 N | 089 34 46 W |
| Mound School (historical) | School | 212 | McDonough | 40 30 14 N | 090 27 58 W |
| Mount Sinai Baptist Church | Church | 212 | Lake | 42 19 29 N | 087 51 40 W |
| Mount Zion | Populated Place | 212 | Macon | 39 46 17 N | 088 52 27 W |
| Mount Zion Junior High School | School | 212 | Macon | 39 46 00 N | 088 52 33 W |
| Ned Brown Preserve | Park | 212 | Cook | 42 02 19 N | 088 00 28 W |
| Nelson Lake Marsh Nature Preserve | Park | 212 | Kane | 41 50 10 N | 088 22 32 W |
| New Union School (historical) | School | 212 | Piatt | 40 02 26 N | 088 42 27 W |
| Niebuhr Hall | Building | 212 | DuPage | 41 53 48 N | 087 56 47 W |
| Nimtz Quarry Number 107 | Mine | 212 | Winnebago | 42 19 54 N | 089 00 14 W |
| Nokomis South Middle School | School | 212 | Montgomery | 39 18 00 N | 089 16 46 W |
| North Arm Church (historical) | Church | 212 | Edgar | 39 38 38 N | 087 37 53 W |
| North Arm Community Center | Locale | 212 | Edgar | 39 38 37 N | 087 37 52 W |
| North School Park | Park | 212 | Cook | 42 05 10 N | 087 58 52 W |
| Norwood | Populated Place | 212 | Mercer | 41 05 21 N | 090 38 17 W |
| Norwood | Populated Place | 212 | Peoria | 40 42 20 N | 089 41 55 W |
| O'Brien Field | Park | 212 | Coles | 39 28 50 N | 088 10 52 W |
| Oakbrook Village Hall | Building | 212 | DuPage | 41 49 58 N | 087 56 48 W |
| Oakwood Park | Park | 212 | Cook | 41 30 44 N | 087 43 27 W |
| Old Main | Building | 212 | Lake | 42 14 01 N | 087 49 47 W |
| Old Zion Museum | Building | 212 | Cook | 41 34 28 N | 087 46 54 W |
| Ophir Center School (historical) | School | 212 | La Salle | 41 29 54 N | 088 59 16 W |
| Orchard Brook Park | Park | 212 | DuPage | 41 49 23 N | 088 00 43 W |
| Orland Towne Center Shopping Center | Locale | 212 | Cook | 41 36 01 N | 087 50 44 W |
| Our Lady of the Brook Worship Center | Church | 212 | Cook | 42 08 25 N | 087 52 17 W |
| Our Lady of the Wayside Church | Church | 212 | Cook | 42 04 33 N | 087 59 18 W |
| Palos Park Presbyterian Church | Church | 212 | Cook | 41 39 59 N | 087 50 08 W |
| Pea Green School (historical) | School | 212 | Adams | 39 58 30 N | 090 55 57 W |
| Pflibsen School (historical) | School | 212 | La Salle | 41 10 41 N | 089 01 50 W |
| Phillips School (historical) | School | 212 | Tazewell | 40 35 06 N | 089 24 44 W |