The Lot Rent Index

Thirteen state registries list 12,942 licensed mobile home parks across 604 counties. In the eight states whose registries publish a lot count, those parks hold 987,458 lots. Only three registries record vacancies at all: NY, OR, VT. Across those 132,012 lots, 10,561 (8%) were reported empty. HUD's FY 2026 two-bedroom fair market rent across the same 604 counties spans $873 to $4,214 a month. That is the area apartment benchmark, not lot rent, which usually runs well below it.

The thing this data keeps showing

There is no national registry of mobile home parks. There are thirteen state files in thirteen formats, and they do not ask the same questions. Eight of them count lots. Only three count vacancies. Not one of the thirteen registry files carries lot rent, which is the number every resident, every reporter and every housing agency actually wants. That absence is the story underneath every other number on this page, and it is why it was news when Maine published rents separately in August 2026.

By state

Ranked by registered parks. Lots and vacancies are whatever that state's registry publishes — several publish neither, and the table says so rather than printing a zero. 2-BR FMR is the range of HUD FY 2026 two-bedroom fair market rents across that state's counties: the area apartment benchmark, not lot rent, which usually runs well below it. Each state links to its own page, with the full county table and that state's sources.

Lot and vacancy totals are over the states that report them (CA, FL, NY, OR, MI, IL, ND, VT for lots; NY, OR, VT for vacancies). Adding a state that publishes neither would not change either total, so neither is a national estimate. Within those lot-reporting states, 46 parks carry no lot count of their own, so the lot total is over the rest. 1 registry row reports more vacant lots than the park has; it is excluded rather than guessed at.

What we can see about the parks themselves

• 1,348 parks (10.4%) run their own EPA-regulated drinking-water system. A well or intake, a distribution main, a meter on every lot: a water utility that also rents land. This is a floor: it counts only the parks we could match to an EPA record confidently enough to publish.
• 847 of 10,312 mapped parks (8.2%) sit in a FEMA special flood hazard area. A manufactured home is more exposed to flooding than a site-built one, because it sits low and is anchored rather than founded. Read that denominator carefully: we hold coordinates for 11,409 of the 12,942 parks, and of those FEMA returns a flood zone for 10,312 plus 169 it maps as Zone D, meaning hazard undetermined and no analysis done. The rest are parks we could not place on a map or that FEMA has not analysed. An unmapped park is unmapped, not safe, and this share says nothing about it either way.
• 12 parks publish a current lot rent we could find and verify. Out of 12,942. That ratio is not a data-collection failure on our end; it is what price transparency looks like in this market.

Method, in one paragraph

We pull each state's own licensing or registration file, normalize the addresses, geocode what we can, and join the result to three federal datasets: HUD's county Fair Market Rents, EPA's inventory of active community water systems, and FEMA's National Flood Hazard Layer. Nothing is modelled, estimated, or filled in. Where a source is silent, the page says so and shows nothing. Every figure here recomputes from the committed snapshots each time the page is served, so a new pull moves the numbers with no edit to the page. Per-state sources, with each registry's own as-of date, are on each state's page.