61536 is a postalcode and its consensus geometry is derived from uszcta.
{"mz:is_ceased":0,"geom:latitude":40.689898,"wof:name":"61536","counts:names_total":0,"wof:placetype":"postalcode","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102081247,"localadmin_id":404498779,"locality_id":85940017,"postalcode_id":554734145,"region_id":85688697}],"mz:is_deprecated":0,"lbl:latitude":40.689425,"mz:postal_locality_alt":["Washington"],"geom:area":0.011364,"geom:longitude":-89.786965,"wof:id":554734145,"counts:concordances_total":1,"geom:type":"Polygon","wof:lastmodified":1611184188,"wof:belongsto":[102191575,85633793,102081247,404498779,85940017,85688697],"wof:concordances":{"gp:id":"12784690"},"wof:repo":"whosonfirst-data-postalcode-us","src:geom":"uszcta","wof:country":"US","counts:names_preferred":0,"gp:parent_id":"12588149","geom:area_square_m":1.06543604454401E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","counts:names_languages":0,"geom:bbox":"-89.85179,40.615584,-89.717403,40.75079","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-89.793782,"wof:geomhash":"4af7aebfe85bbf7407b50a6794ba99dd","wof:parent_id":85940017,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu","mz:postal_locality":"Hanna City"}