Getting land

[Shiv Jey]

I've been going through some land-for-sale in my town (Seattle) and consulting the traditional avenues (Zillow, Redfin, etc).  I noticed that the land allocation "boxes" placed by zillow and redfin sometimes are blank with just pure land and no house or anything.  Does this mean it's owned by the township?  How do I find this out, who, and how do I even ask the question so they know what I'm talking about?

For example, "When reviewing the property lines for XXX neighborhood, I notice that between house XX on Mulberry Street and YY on First ave are two lots of land.  Is the state willing to sell this property?".  Doesn't seem right...perhaps you guys have some insight into how to approach this?