How to find any city boundary
City boundary usually can be found in county's arcgis online or enterprise portal.
Step 1.
google search
Step 2.
looking for xxx.arcgis.com or xxx.opendata.arcgis.com
Step 3.
looking for button, view data source
https://data-ocpw.opendata.arcgis.com/datasets/OCPW::city-boundaries-4/about
Step 4.
click view data source button, city boundary layer REST api endpoint is here.
https://ocgis.com/arcpub/rest/services/Map_Layers/City_Boundaries/MapServer/0
Step 5.
copy paste REST api root URL in transparentgov, click let's go button
https://transparentgov.net/json2tree/esri/server/folder2.html?org=https%3A%2F%2Focgis.com%2Farcpub%2Frest%2Fservices&url=https%3A%2F%2Focgis.com%2Farcpub%2Frest%2Fservices&arcgis_online_token=&timeout=9000&select_folder=383&select_layer=0&select_folder_text=City_Boundaries+%3Csup%3EMapServer%3C%2Fsup%3E&select_layer_text=0+%26%23x21E2%3B+City+Boundaries+%3Csup%3EFeature+Layer%3Csub%3E+esriGeometryPolygon%3C%2Fsub%3E%3C%2Fsup%3E
Step 6.
los angeles county city boundary is here
https://transparentgov.net/json2tree/esri/server/folder2.html?org=https%3A%2F%2Fpublic.gis.lacounty.gov%2Fpublic%2Frest%2Fservices&url=https%3A%2F%2Fpublic.gis.lacounty.gov%2Fpublic%2Frest%2Fservices&arcgis_online_token=&timeout=9000&select_folder=28&select_layer=0&select_folder_text=LACounty_StreetMap+%3Csup%3EMapServer%3C%2Fsup%3E&select_layer_text=0+%26%23x21E2%3B+Cities+and+Communities+%3Csup%3EFeature+Layer%3Csub%3E+esriGeometryPolygon%3C%2Fsub%3E%3C%2Fsup%3E
Step 7.
San bernadino county city boundary is here
https://transparentgov.net/json2tree/esri/server/folder2.html?url=https%3A%2F%2Fservices.arcgis.com%2FaA3snZwJfFkVyDuP%2FArcGIS%2Frest%2Fservices&org=https%3A%2F%2Fservices.arcgis.com%2FaA3snZwJfFkVyDuP%2FArcGIS%2Frest%2Fservices&arcgis_online_token=&select_folder=102&select_layer=0&select_folder_text=Cities_and_Towns+%3Csup%3EFeatureServer%3C%2Fsup%3E&select_layer_text=0+%26%23x21E2%3B+Cities+and+Towns+%3Csup%3EFeature+Layer%3Csub%3E+esriGeometryPolygon%3C%2Fsub%3E%3C%2Fsup%3E
Step 8.
river-side county city boundary is here
https://transparentgov.net/json2tree/esri/server/folder2.html?org=https%3A%2F%2Fgis.countyofriverside.us%2Farcgis_mapping%2Frest%2Fservices&url=https%3A%2F%2Fgis.countyofriverside.us%2Farcgis_mapping%2Frest%2Fservices&arcgis_online_token=&timeout=9000&select_folder=45&select_layer=100&select_folder_text=General+%3Csup%3EMapServer%3C%2Fsup%3E&select_layer_text=100+%26%23x21E2%3B+CITIES+%3Csup%3EFeature+Layer%3Csub%3E+esriGeometryPolygon%3C%2Fsub%3E%3C%2Fsup%3E
Step 9.
orange county city boundary is here
Step 10.
Find your county, your city boundary by repeat step 1 - to - step 9