if you indeed want help/advise here - you might wanna be a bit more
specific. Do you want a code or formula or manual solution?
How do you want the matching cells to be drawn to your attention - get
them selected, get them highlighted (but then, what if column a has
1000 different values that mathc 30000 cells in col B?).
Need to be more specific.

On Jan 28, 1:47*pm, gcotterl wrote:
Col A has 3,000 rows
Col B has 57,350 rows.

How do I find the cells in Col B whose contents match those in Col A?