How to Write a Cover Letter

First of all, your cover letter needs to include your contact information (name, address, phone, email) so prospective employers can get in touch with you.
Your cover letter should include at least three paragraphs:
1. What you are applying for and where you found the job posting - First Paragraph
2. What you have to offer - Middle Paragraph(s)
3. How you will follow-up - Final Paragraph


In the first paragraph, if you are writing in response to a job posting, indicate where you learned of the position and the title of the position. More importantly, express your enthusiasm and the likely match between your credentials and the position's qualifications.
The second paragraph of your cover letter should refer specifically to the qualifications listed in the job posting and illustrate how your particular abilities and experiences relate to the position for which you are applying.
The final paragraph of your letter should reiterate your interest in the job and let the employer know how they can reach you and include your phone number and email address.

Cover Letter Format
Cover letter presentation matters as much as what you include. When writing cover letters it's important to use a basic font that is easy to read. Depending on the hiring process your cover letter may be viewed in an applicant tracking system or other online hiring system. Those systems work best reading simple text rather than fancy formatting.
It's also important for the hiring manager to be able to easily read your resume. Using a basic 12 point font will ensure that your cover letter is easy to read. Basic fonts like Arial, Verdana, and Times New Roman work well. Don't forget to leave space between paragraphs and to proof your letter before you send or upload it. Do remember that your cover letter fonts should match your resume.

Here is a Sample Cover Letter Format