Wyoming Ground Snow Load by County and City

Wyoming sets no ground snow load at state level, so every figure comes from a county or city building department. Four figures from Wyoming counties and cities are set out below, each with the ordinance or code amendment it was printed in. 19 states work this way, which is why a search for one Wyoming figure comes back with several different answers from several different pages, all of them correct for the place they were written for. four Wyoming figures, running from 30 psf at Rock Springs to 36 pound ground snow at Sheridan, every one of them quoted from the document it was printed in. Nationally 235 figures were read across 33 states.

The city or county building department: each jurisdiction adopts its own code and publishes its own figure. In its own words: “The City of Sheridan falls under the below criteria:”

Part of Wyoming is a case study area, meaning the published document expressly declines to give those places a figure and sends the designer back to the local building department for one. 16 states carry a rule like this, and it is the commonest reason a search for a single number comes back empty. The rule reads: “k. Use ASCE Hazard Tool.”

Wyoming splits into zones or bands rather than counties, so the boundary that matters is drawn on the document itself. The published Wyoming figures run from 30 psf to 36 pound ground snow.

A ground snow load is a weight per unit area and not a depth, and the two are joined only by the density of the snow on the day, which is why the published documents give the load and leave the depth out. Wet spring snow and dry January snow of the same depth are different weights on the same roof. The city or county building department works in loads for that reason, and so does every figure set out below.

A Wyoming figure for an address the documents below do not cover comes from the city or county building department. The document behind it is Informational Bulletin #2, Codes and Design Information, published by City of Laramie Code Administration Division, read on September 23, 2026. It establishes the point this way: “With a few exceptions outlined in Laramie Municipal Code Chapter 15.24, the City of Laramie follows the 2024 International Building Code published by the International Code Council (ICC).”

14 of 50: Connecticut, Indiana, Maryland, Massachusetts, Michigan, Minnesota, Montana, New Hampshire, New Jersey, North Carolina, Rhode Island, Utah, Vermont, Wisconsin. The other 36 split into 17 that adopt the national code without a snow amendment and 19 that leave every figure to a county or city building department. That is the single most useful fact about this subject and no one state's own website carries it.