{"state":"District of Columbia","abbr":"DC","built":"2026-10-25","source":"U.S. Census Bureau 2025 Gazetteer (places); groups use Vintage 2025 population estimates","fields":["name","group (0 or missing = A to Z list; 1, 2, 3 = largest places, 1 = largest; 4 = other place of 100,000+)","page (town page link, if any)","label (only when needed to tell same-named places apart)"],"order":"A to Z, case-insensitive","top_n":3,"big_pop":100000,"places":[["Washington",1]]}