I’d say so, yes. I did A level sociology and psychology last year and they go really well together. Both include a chapter on research methods, which reduces the overall amount of content that you have to learn. Sociology also includes the topic on demography in the family unit, which may overlap with geography.
It does depend on what you want to do career wise. If you wanted to do a Social Sciences degree (I did a BA in Sociology and an MSc in Psychology) it is a good mix.
In terms of Sociology degree's a lot of people end up working for local Government, or go on to post graduate study leading to either social work or teaching. Psychology is a little more ambiguous, you can do the same, but to be a fully qualified Psychologist you must progress to Doctorate level study.
You might be best speaking to the careers adviser in the college for further guidance