Free LIDAR Data Sources List–Download LIDAR
Source: grindgis.com
Definition of LIDAR:
Light Detection and Ranging (LIDAR) is active remote sensing which uses laser lights to strike features and record the reflected pulses to generate the 3D model of objects. Nowadays LIDAR data is widely used in different field. But the problem is, it is expensive and there are only few websites that provide access to download the data for free. Free LIDAR data are mostly from the United States area.
Mostly, LIDAR data is in the LAS format. To browse the LIDAR data, you need specific extension for a software or a LIDAR software. I have created a page that talks about the 10 most popular LIDAR module that is available in the market. Our team has researched on the internet to find websites that provide access to download data.
1. NOAA
It stands for the National Oceanic and Atmospheric Administration which have large LIDAR data set of the USA coastal regions. It is most easy and quick way to get LIDAR data. To download the data, go to their Data Access Viewer web map and select the area of interest using draw area tool.
draw area icon and create a rectangle on the map. It will take few seconds to display the LIDAR data. 
Process 2: After the LIDAR data is displayed, then press Add to Cart 
icon. As all data sets are loaded to the cart, press the 
Checkout button to download it.
2. USGS Earth Explorer
USGS provide free LIDAR data of the USA, before it was provided by the CLICK (Center for LIDAR Information Coordination and Knowledge). Now you can access this information through Earth Explorer web map. Get registered your username to download the data.
Process 1: Search the area of interest 
or find the desire location by zooming in to the area. Then press 
use map icon to get the coordinate values. After this click on the 
icon which will take you to the next window.
and click the Results 
Process 3: You have to register to download 
the free LIDAR data, click on the download icon of your desired LIDAR image. It will take you to the downloading window.
3. United States Interagency Elevation Inventory:
The best sources of the LIDAR data is from the United States Interagency Elevation Inventory (USIEI). It started by the collaboration between NOAA and the U.S. Geological Survey, with the help from the Federal Emergency Management Agency (FEMA). To download the LIDAR data the process is not that simple, they have a web map through which you can download the data.
Process 1: Choose the name of the desired states and then select the desired county name
Process 2: After searching the data which might take few seconds, at the bottom it will display all data of the Baldwin County.
Process 3: Click your desired row that will take you to the right website from where you can download the data.
4. National LIDAR Dataset (United States)
5. Open Topography
Open Topography is the public domain where users upload their data for public to have access of high quality topographic and bathymetry data. Open Topography system is based on the San Diego Supercomputer center at the University of California.
to download the LIDAR data. 
Process 3: Click on the Data set name
Process 4: Go to the Download and Access products heading in the middle of the page to download the data.
Other Countries Free LIDAR Data:
6. GEOSUD
French website maintains the access of Free LIDAR data of few countries. These countries are from Europe, Asia, Africa and South America, go to their map to see list. Website is in the French; you switch to English using google translator.
Process 2: Click on the data link to download it.
7. gipuzkoa.net (SPAIN)
The LIDAR data of the North of Spain is free which can be accessible by visiting their English version web map. Click on the grid map to download the data. Data are in LAS files of 1 sq. km. There reference system is EPSG:25830 – ETRS89 / UTM zone 30N. This data can be also downloaded from FTP site maintain by the gipuzkoa government, this ftp version have data from 2012 too. (Source: researchgate.net)
Spain government has provided free LIDAR data, you can directly download from their website, DOWNLOAD
8. Free LIDAR data for the United Kingdom
Centre for the Environmental Data Archival maintains the Free LIDAR data of the United Kingdom. You can download 1m resolution data. To have the access of the data you need to register.
9. Free LIDAR data for Philippines
You can download Philippines LIDAR data from the LIPAD website.
10. Extra Resources for Students:
Sample LIDAR Data for School Works: When you are doing the course work, you need sample free LIDAR data. So including few links from where you can download the data.