JSON object of state names to population. Source: https://worldpopulationreview.com/states (from US Census Bureau's 2017 population estimates)

us_state_population_estimates_2017_lookup.json

{
   "Alabama":4908620,
   "Alaska":734002,
   "Arizona":7378490,
   "Arkansas":3039000,
   "California":39937500,
   "Colorado":5845530,
   "Connecticut":3563080,
   "Delaware":982895,
   "District of Columbia":720687,
   "Florida":21993000,
   "Georgia":10736100,
   "Hawaii":1412690,
   "Idaho":1826160,
   "Illinois":12659700,
   "Indiana":6745350,
   "Iowa":3179850,
   "Kansas":2910360,
   "Kentucky":4499690,
   "Louisiana":4645180,
   "Maine":1345790,
   "Maryland":6083120,
   "Massachusetts":6976600,
   "Michigan":10045000,
   "Minnesota":5700670,
   "Mississippi":2989260,
   "Missouri":6169270,
   "Montana":1086760,
   "Nebraska":1952570,
   "Nevada":3139660,
   "New Hampshire":1371250,
   "New Jersey":8936570,
   "New Mexico":2096640,
   "New York":19440500,
   "North Carolina":10611900,
   "North Dakota":761723,
   "Ohio":11747700,
   "Oklahoma":3954820,
   "Oregon":4301090,
   "Pennsylvania":12820900,
   "Puerto Rico":3032160,
   "Rhode Island":1056160,
   "South Carolina":5210100,
   "South Dakota":903027,
   "Tennessee":6897580,
   "Texas":29472300,
   "Utah":3282120,
   "Vermont":628061,
   "Virginia":8626210,
   "Washington":7797100,
   "West Virginia":1778070,
   "Wisconsin":5851750,
   "Wyoming":567025
}