| Name | Lines of code | Maintainability | Test coverage |
| django/urls/resolvers.py | 693 | F 4 days | |
| django/template/defaultfilters.py | 765 | F 3 days | |
| django/db/migrations/state.py | 791 | F 4 days | |
| django/db/models/options.py | 801 | D 2 days | |
| django/template/base.py | 888 | F 5 days | |
| django/forms/widgets.py | 979 | F 4 days | |
| django/db/migrations/operations/models.py | 1,043 | F 5 days | |
| django/forms/fields.py | 1,129 | F 6 days | |
| django/template/defaulttags.py | 1,172 | F 4 days | |
| django/contrib/admin/checks.py | 1,220 | F 4 days | |
| django/db/models/fields/related_descriptors.py | 1,232 | F 6 days | |
| django/forms/models.py | 1,315 | F 1 wk | |
| django/db/models/expressions.py | 1,628 | F 1 wk | |
| django/db/migrations/autodetector.py | 1,659 | F 2 wks | |
| django/db/models/fields/related.py | 1,673 | F 5 days | |
| django/db/backends/base/schema.py | 1,699 | F 1 wk | |
| django/db/models/sql/compiler.py | 1,755 | F 1 wk | |
| django/db/models/base.py | 1,991 | F 1 wk | |
| django/db/models/sql/query.py | 2,134 | F 2 wks | |
| django/contrib/admin/options.py | 2,145 | F 1 wk | |
| django/db/models/query.py | 2,226 | F 1 wk | |
| django/db/models/fields/__init__.py | 2,383 | F 1 wk |