Weld County, Colorado Real Estate including Ranches and Farms operations, has a total area of 3,992.45 square miles. That allows for 45.3 people per square mile. In the 2007 Census of Agriculture it states 47.6% of the total greal estate in Weld County is used for agriculture. More than 679,000 people in 2008 call these ranches and farms home. Of the total area used for farming only 20% is Irrigated Farms, keeping the overall supply low in the real estate market. In 2007 nearly 2.5 million acres have been placed in a Conservation or Wetland Reserve Programs, to perserve this ground for future generations. Weld County accounted for 6.3% of the total U.S. of cattle and calves numbers. Ranches and farms are a large part of Weld County and the Colorado economy. To read more on Weld County colorado visit http://www.ers.usda.gov/StateFacts/CO.htm .