Seseo in Spain

What parts of Spain today speak with “seseo”?

Andalusía (not all of it. There are also parts who do “ceceo”, we can only find that in some parts of andalucia, nowhere else; remember “ceceo” is when they pronunce the “s” as “z”) and the Canary islands

I found this map that shows the “seseo”, “ceceo” and “distinción” areas - is this map accurate?

It is. Far more people in Andalusia doing ceceo than seseo. The rest of Spain we don’t do seseo nor ceceo, we pronounce “well” or we do the “standard” pronunciation, we diferenciate between s,c and z.

You can see the whole Spain here:

They left out the Canary islands on that map, but count them as doing seseo.