Top 20 NuGet geolocation Packages

Google Places, Maps, Roads, Search and Translate. Requests and Responses are complete with Google api documentation and references.
Easly access geolocation across Xamarin.iOS, Xamarin.Android, and Windows.
Brings the functionality of the Windows.Devices.Geolocation APIs cross-platform with support for Windows, Android and iOS.
.Net library for GeoJSON types and corresponding Json.Net (de)serializers.
MaxMind GeoIP2 Database Reader and Web Service Client
.NET reader for the MaxMind DB file format
Provides an IANA time zone identifier from latitude and longitude coordinates.
A simple library for performing the a reverse geolocation lookups via Google Maps. This currently allows you to translate latitude / longitude to a region (state) and an address to a map point.
IP-2-Country Datasource for http://software77.net/geo-ip
IP-2-Country Datasource for all the registries (RIPE, APNIC, ARIN, LACNIC and AFRINIC)
IP-2-Country Datasource for https://dev.maxmind.com/geoip/legacy/geolite/
IP-2-Country Datasource for https://github.com/Markus-Go/ip-countryside
IP-2-Country Datasource for https://ip.ludost.net/
IP-2-Country Datasource for https://iptoasn.com
IP-2-Country Datasource for http://www.ip2iq.com/
IP-2-Country Datasource for https://db-ip.com/
Provides base classes for handling CSV files (plain, gzipped or zipped) for IP2Country
Spatialite extension for Xamarin Forms (Android & iOS)
Geolocation extensions
Operations and data types used with the ArcGIS REST API.