Right-handed, right foot down.  We will need a bigger sample size to determine if there is a correlation though.

I’m not sure if this is going to help. I’m left-handed, and I always mount the bike from the left side, so I swing my right leg over and clip in that side first. So, I’m starting out with left foot down. When I come to a stop though, I almost always put my right foot down, and then restart from that position.

When I started cycling I was definitely a right foot down guy. I switched to recumbent bikes in 1998 and was still a right foot down guy for a while. But recumbent cyclists have difficulty reaching the ground, and I discovered that I can reach and grip the ground more easily with my left foot because of the camber of the road. So for the last 20+ years I have been a left foot down guy, and the correct answer for me depends on which side of the road is higher. In the UK or Australia it would be right foot down because that side of the road is higher. 

I am left handed but very much right footed. I can control my right leg easily, but my left leg seems spastic in comparison. My right leg pedals in elegant circles. My left leg is almost incapable of a smooth circular motion.

Why do I always have to be the exception to every rule?! I am right-handed with a pen but am left foot down and mount the bike from the left side. I am left with a golf club, hockey stick and baseball bat; I am right with both tennis and badminton rackets. Am I some kind of imposter?

I write and hold a fork with my left hand, so American society considers me to be left handed even though I do EVERYTHING else with my right hand and right foot. I use tools with my right hand. I use right handed scissors. I throw and kick balls with the right side. I operate buttons and zippers with my right hand. I use a computer mouse with my right hand. The left side has noticeably less strength and dexterity.

Dodie here. Left-handed for writing, eating, holding a telephone, and other such things requiring manual dexterity. Notable exceptions include knitting and crochet, which were self taught from instruction books that were written for righties. Scissors and power tools are used right handed since that is what is generally available. On bike I am fairly exclusively left footed. I put left foot down first when stopping, keep left foot down when coasting, and start by pushing off on left foot. Conclusions? Who knows but it seems that handedness and footedness seem to be more or less matching. 

I’m the weird one!  I’m strictly left handed.  But when I ride a bicycle, I can only come down on my right foot.  I have cleats on my bike shoes and I virtually always keep my left foot clipped in.  I think that’s because it’s my strongest leg and as a result I can start up faster.  Before I got bad arthritis in my right foot, I would clip in my right foot but now I leave in unclipped.  Fortunately, one side of my pedal is flat.

You ride with one foot clipped in, and one foot not? That feels comfortable enough? I haven't heard of anyone doing that, but if it works, that's good out of the box thinking.

It feels safer than not being able to unclip in time.  it wouldn’t work to well on a steep climb but I’d probably being walking anyway.