Can dementia cause dizziness?

Sort of: There are many causes of dementia, including some we don't normally think of, such as vitamin deficiency, stroke, or brain tumor. Some of these diseases can cause dizziness in addition to dementia. More typically, dizziness does not accompany dementia. Dizziness can be a separate problem from dementia, or might help pinpoint an underlying cause for both.

Indirectly: People with dementia may have misperceptions of their environment, diff with depth of field, and vision, which can all contrib to a perception of dizziness; but must establish the defn of dizziness vs vertigo as well.